I have alot of sites I could post, what are you looking for?
The cheapest ones don't always have the best shapes. But the ones with the most shapes are often copper and they cost the most (also tend to be less detailed the tin). I gave up on buying cookie cutters. I kept needing something with no time to buy.
I now make all of mine myself for pennies. I bought copperflashing and cut out strips then fold them how I want (while watching t.v.). I've been duct taping them together so far out of laziness, but I believe you can sodder them. It's kind of like a hobby. I've come to use it in other ways too. For instance I made shoes out of chocolate plastic and the way I figured out how to shape them was over something. So I made a shoe model out of copper flashing and now I can re-make chocolate shoes every year in minutes. Sounds hard, but it wasn't.
For baking supplies I've been buying from kerkes lately. http://www.kerekesequip.com
They have good prices and pretty good service!