Bukkit

What steps will reproduce the problem?
1. Setup an exchange showcase, using Gold Ingot to create
2. Set showcase to: glowstone_dust, 4, x number of ingots
(Ignorign teh error message about translation for the Exchange rate, as this is in another ticket)
3. Try to buy from the exchange

What is the expected output? What do you see instead?
I would expect the above to sell 1 Gold Ingot for 4 Glowstone Dust
Instead, The buyer can buy 1 Gold Ingot for 1 Glowstone Dust

What version of the product are you using?
0.7.9 on CraftBukkit 1.01-R1

Do you have an error log of what happened?

Please provide any additional information below.