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The Vendor quest is accessible from level 300. You have to complete his quest in order to get access to him and his trades.

To impress the Vendor, players need to show him 5 rare and/or high value items. Showing a Blood Diamond will impress him instantly without 4 other items.

After completing his quest, he allows to trade items with him. Below is the list of items to impress the Vendor:

Items Impressive Items Impressive Items Impressive Items Impressive                                     Unknown(?)                                   Instant               Unknown(?)        ## Mechanism Edit

The vendor will change his set of three items randomly every 12 hours. It's possible to have repetitive items in a set.

There are currently 37 possible sets of unique trades. The chance to get at least one desired trade in a set of three each time would be calculated via this formula:

$P = \frac{Pr_{(n,q)} - Pr_{(n-1,q)}}{Pr_{(n,q)}}$ where

$Pr_{(n,q)} = n^q$ and

$Pr_{(n-1,q)} = (n-1)^q$

n = 37, q = 3

P = 1 - (36/37)^3 = 0.079 or 7.9%

With this chance, one should have 38.96% chance to get at least one desired trade after 3 days. The formula is binomial probability with at least one.

$P_2 = 1 - P_{(n, q, k)}$ where

$P_{(n, q, k)} = C_{(n,q)}k^q(1-k)^{n-q}$ and

$C_{(n, q)} = \frac{n!}{q!(n-q)!}$

n = 6, q = 0, k = 0.079

C(6, 0) = 1

P(6, 0, 0.079) = 1 * 0.079^0 * 0.921^6 = 0.61

P2 = 1 - 0.61 = 0.389

Days Chance
3 38.96%
6 62.75%
10 80.71%

## Trivia Edit

• Each of his item varies in amount, while player's items are usually a fixed amount.
• When players are offline, the vendor timer won't run after the 12 hours renewal rotation. Players need to log in to trigger it.