Panda is an excellent choice, although I'm not 100% sure this is what you want.
It still relies on the data you gather from scanning the AH to tell you the prices.
However, if you have accurate data, Panda is ridiculously fun to use. You can see the prices of every item it takes to create a enchant scroll and also what the scroll itself sells for.
Therefore, you can (in theory) make a lot of gold from doing basic math and making the items that are cheap to buy and sell the items you create that have the greatest profit margin.