I've noted that AuctionDB and WoWuction's market price usually differ (higher price normally) than the minimum buyout of the AH.
This usually leads to some problems with the crafting queue. TSM thinks an item can be sold for 300g, while in reality the minimum is 100g and way below the crafting cost. This often leads to crafted stock that wont be sold at a profit.
What pricing method do you use with TSM?
Does it yield good results?