Is it the plugin "SignShop"?
If so, what is the actual problem.
SignShop is an easy way to create player shops, or server shops, its very simple:
-Put the desired item the player will be buying/selling into a chest
-Put a sign somewhere that says:
[iBuy] for an infinite buying sign
[iSell] for an infinite selling sign
[Buy] for a limited buying sign
[Sell] for a limited selling sign
-Put that code into the first line, anything you want into line 2 and 3, and then in line 4 put "$price"
-then bang the chest with a redstone dust, and then bang the sign with the redstone dust
-you have now made a sign shop!
(if your using an infinite buying or selling shop, you can break the chest, if not, leave the chest)
