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From EverQuest Legends Wiki

Current Test: Vendor Pricing

Scope

Using EQ Traders Vendor Pricing as a reliable'ish source, we can assume the following:

  • Charisma has meaningful breakpoints, especially between ~61-76 and ~100+, after which additional CHA has diminishing or no effect.
  • Faction breaks into three functional tiers for pricing:
  1. Apprehensive, Indifferent or better, and Dubious or worse. (Indifferent-or-better vendors give identical prices for the same charisma--Ally does not improve prices beyond Indifferent.)
  2. Dubious-or-worse vendors won’t sell to you at all.
  3. Apprehensive vendors will sell, but prices are significantly worse unless charisma is very high.

These two facts define the scope of our current testing: you only need to test Apprehensive and Indifferent factions across a range of charisma values.

Control Variables

Vendor: Use one vendor for the entire test.

Item: Use one item with a stable base price (e.g., Water Flask, Bandage, but the higher priced the better).

Faction level: You must be able to reliably set your faction to:

  • Apprehensive
  • Indifferent
  • (Optional) Amiable / Kindly / Warmly / Ally -- but these will all give identical prices.

Charisma value: You need a reproducible way to set CHA to specific values (e.g., 50, 75, 85, 100, 120, 125, 150, 175, 200) -- (recommend crafted CHA jewelry and farming some CHA armor)

CHA Test Table

Item Tested: Diamond

Base Price: 200p

Max Sell Price: 194.476p

Merchant: Serenk Greybloom

Raw Plat Cost Percent Inverted
Charisma Apprehensive Indifferent Apprehensive Indifferent Apprehensive Indifferent
57 138.819 155.477 69.4095% 77.7385% 144.0725% 128.6364%
58 139.311 156.028 69.6555% 78.0140% 143.5637% 128.1821%
59 139.807 156.584 69.9035% 78.2920% 143.0544% 127.7270%
60 140.306 157.143 70.1530% 78.5715% 142.5456% 127.2726%
61 142.807 160 71.4035% 80.0000% 140.0492% 125.0000%
62 142.867 160 71.4335% 80.0000% 139.9903% 125.0000%
63 142.857 160 71.4285% 80.0000% 140.0001% 125.0000%
64 142.857 160 71.4285% 80.0000% 140.0001% 125.0000%
65 142.857 160 71.4285% 80.0000% 140.0001% 125.0000%
66 142.857 160 71.4285% 80.0000% 140.0001% 125.0000%
67 142.857 160 71.4285% 80.0000% 140.0001% 125.0000%
68 142.857 160 71.4285% 80.0000% 140.0001% 125.0000%
69 142.857 160 71.4285% 80.0000% 140.0001% 125.0000%
70 142.857 160 71.4285% 80.0000% 140.0001% 125.0000%
71 142.857 160 71.4285% 80.0000% 140.0001% 125.0000%
72 142.857 160 71.4285% 80.0000% 140.0001% 125.0000%
73 142.857 160 71.4285% 80.0000% 140.0001% 125.0000%
74 142.857 160 71.4285% 80.0000% 140.0001% 125.0000%
75 142.857 160 71.4285% 80.0000% 140.0001% 125.0000%
76 150.714 168.8 75.3570% 84.4000% 132.7017% 118.4834%
77 151.429 169.6 75.7145% 84.8000% 132.0751% 117.9245%
78 152.143 170.4 76.0715% 85.2000% 131.4553% 117.3709%
79 152.857 171.2 76.4285% 85.6000% 130.8412% 116.8224%
80 153.571 172 76.7855% 86.0000% 130.2329% 116.2791%
81 154.286 172.8 77.1430% 86.4000% 129.6294% 115.7407%
82 155 173.6 77.5000% 86.8000% 129.0323% 115.2074%
83 155.714 174.4 77.8570% 87.2000% 128.4406% 114.6789%
84 156.429 175.2 78.2145% 87.6000% 127.8535% 114.1553%
85 157.143 176 78.5715% 88.0000% 127.2726% 113.6364%
86 157.857 176.8 78.9285% 88.4000% 126.6969% 113.1222%
87 158.571 177.6 79.2855% 88.8000% 126.1265% 112.6126%
88 159.286 178.4 79.6430% 89.2000% 125.5603% 112.1076%
89 160 179.2 80.0000% 89.6000% 125.0000% 111.6071%
90 160.714 180 80.3570% 90.0000% 124.4447% 111.1111%
91 161.429 180.8 80.7145% 90.4000% 123.8935% 110.6195%
92 162.143 181.6 81.0715% 90.8000% 123.3479% 110.1322%
93 162.857 182.4 81.4285% 91.2000% 122.8071% 109.6491%
94 163.571 183.2 81.7855% 91.6000% 122.2711% 109.1703%
95 164.286 184 82.1430% 92.0000% 121.7389% 108.6957%
96 165 184.8 82.5000% 92.4000% 121.2121% 108.2251%
97 165.714 185.6 82.8570% 92.8000% 120.6899% 107.7586%
98 166.429 186.4 83.2145% 93.2000% 120.1714% 107.2961%
99 167.143 187.2 83.5715% 93.6000% 119.6580% 106.8376%
100 167.857 188 83.9285% 94.0000% 119.1490% 106.3830%
101 168.571 188.8 84.2855% 94.4000% 118.6444% 105.9322%
102 169.286 189.6 84.6430% 94.8000% 118.1433% 105.4852%
103 170 190.4 85.0000% 95.2000% 117.6471% 105.0420%
104 170.714 190.476 85.3570% 95.2380% 117.1550% 105.0001%
105 171.429 85.7145% 116.6664%
106 172.143 86.0715% 116.1825%
107 172.857 86.4285% 115.7026%
108 173.571 86.7855% 115.2266%
109 174.286 87.1430% 114.7539%
110 175 87.5000% 114.2857%
111 175.714 87.8570% 113.8213%
112 176.429 88.2145% 113.3600%
113 177.143 88.5715% 112.9031%
114 177.857 88.9285% 112.4499%
115 178.571 89.2855% 112.0003%
116 179.286 89.6430% 111.5536%
117 180 90.0000% 111.1111%
118 180.714 90.3570% 110.6721%
119 181.429 90.7145% 110.2360%
120 182.143 91.0715% 109.8038%
121 182.857 91.4285% 109.3751%
122 183.571 91.7855% 108.9497%
123 184.286 92.1430% 108.5270%
124 185 92.5000% 108.1081%
125 185.714 92.8570% 107.6925%
126 186.429 93.2145% 107.2794%
127 187.143 93.5715% 106.8701%
128 187.857 93.9285% 106.4640%
129 188.571 94.2855% 106.0608%
130 189.286 94.6430% 105.6602%
131 190 95.0000% 105.2632%
132 190.476 95.2380% 105.0001%

Tested as a Barbarian BRD/NEC/SHM with a combination of positive and negative charisma gear. Later tests done as a Human BRD/NEC/SHM.

Testing steps:

  1. Equipped negative charisma gear to drop from 75 base charisma to 58
  2. Confirmed sell price with several merchants to rule out the merchant being greedy
  3. Checked sell price with merchant, then changed gear to increase charisma by 1 and checked again
  4. Repeated this process until I reached the max sell price and confirmed it kept going.
  5. Turned in Tumpy Tonics to increase faction from Apprehensive to Indifferent
  6. Repeated tests
  7. Increased faction to Amiable
  8. Repeated first few tests and received same indifferent results. Proceeded to test breakpoints and every 5 charisma to confirm
  9. Increased faction to Kindly
  10. Repeated Amiable tests to confirm faction did not matter
  11. Sold Diamond to vendor
  12. Tested prices at several points to confirm that the merchant's buy and sell modifiers are inverted
  13. Equipped all CHA gear and destroyed a Diamond to confirm destroy rate
  14. Tested with Barbarian Shaman vendor at Ally. Received Indifferent+ prices with a +11 CHA bonus
  15. Tested a non-class Barbarian vendor and received the same results
  16. Tested a Human Bard vendor at Ally. Received normal Indifferent+ prices.
  17. Changed race from Barbarian to Human with an Origin of South Qeynos
  18. Tested Human Bard vendor. Received +11 CHA
  19. Tested non-Bard Human vendor. Received +11 CHA
  20. Tested several vendors in North Qeynos. +11 CHA
  21. Travelled to Freeport and tested human merchants. +11 CHA
  22. Tested Linadian at Ally. No CHA bonus
  23. Used Sneak to test an Arcane Scientists merchant at Indifferent. +11 CHA
  24. Travelled to Neriak Foreign Quarter
  25. Human merchants at Ally gave +11 CHA
  26. Halflings merchants at Ally give no bonus
  27. Dark Elf merchants at Ally give no bonus
  28. Used Guise of the Deceiver to Illusion: Dark Elf
  29. Merchants gave the same results as previous
  30. Travelled to Qeynos and increased faction with Bloodsabers to Apprehensive
  31. Tested and got the same +11 CHA bonus

Findings

  • Apprehensive and Indifferent use completely different functions
  • Sell and buy multipliers are inverted
  • Max sell value is 1/1.05 (~95.24%)
  • Merchants of the same race give a +11 CHA bonus
  • Apprehensive Breakpoints
    • 62-75 CHA - 1/1.4 buy rate (~71.43%)
    • 132 CHA - Max sell value
  • Indifferent+ Breakpoints
    • 62-75 CHA - 1/1.25 buy rate (80%)
    • 104 CHA - Max sell value
  • Destroying an item sells it at the equivalent of Apprehensive with 75 CHA: 1/1.4 (~71.43%)
  • Indifferent+ is 0.4% extra sell value per point of CHA from 76-103. Unknown why the function breaks at 79.
  • Apprehensive is 0.357% per point of CHA from 76-131. Every 3-4 levels will get an extra 0.0005%, but that's likely just rounding to copper values

Testing seems to match the formulas used by TAKP, whose code is licensed under GPLv2. May be wise to just source them from there with attribution.

https://github.com/EQMacEmu/Server/blob/57cd20ec7fed8883f0984b12957da4afe0812c83/zone/client.cpp#L3062

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