mhh let me remember how the shop was working. (I should start taking notes....)
U create a shop with some indexes into the 8th "Space"(it was the 8th rigth?) of inventory. Additionally u send with the indexes the prices and quantitys of them. Finally a half byte tells the server if u want to buy or sell.
If someone opens the shop he continusly requests the shop informations. Most of them 1 time would have been enough ;-)
Anyway, when u buy an item u send the playerId of the seller, an index relative to the shop items(0..4 in most cases) and the quantity to the server. The server then generates the price for the items, and may reject the request to buy.
In short u cant change the price of an item. He just made an error, and now tries to blame in on an unknown hacker.
