Bartering

Haggling. Every deal over a shop counter teaches you a little, and a better trader gets more for what they sell. What you pay for things stays the same.

Selling

Level		Unlocks	XP
1		Shops pay you 60 % of an item's value
8		Shops pay you 61 % of an item's value
15		Shops pay you 62 % of an item's value
21		Shops pay you 63 % of an item's value
28		Shops pay you 64 % of an item's value
34		Shops pay you 65 % of an item's value
41		Shops pay you 66 % of an item's value
47		Shops pay you 67 % of an item's value
54		Shops pay you 68 % of an item's value
60		Shops pay you 69 % of an item's value
67		Shops pay you 70 % of an item's value
73		Shops pay you 71 % of an item's value
80		Shops pay you 72 % of an item's value
86		Shops pay you 73 % of an item's value
93		Shops pay you 74 % of an item's value
99		Shops pay you 75 % of an item's value

Experience

Buying something and selling it straight back always costs at least a coin for every xp it gives: the shopkeeper keeps the difference.

Level		Unlocks	XP
–		Buying: for each coin the price is above what the shop pays a master trader for it	0.5 xp a coin
–		Selling: for each coin you are paid below the lowest price any shop asks for it	0.5 xp a coin

Stock