I'm poor right now but the wilton pans obviously won't work for a wedding cake. So who's got the best price on square pans?
If you have a tax id# and at least 10 days before you need it you can get wholesale prices on Magic Line pans at CK Products (just add www. and .com to that for their website). You need to be set up with an acct before you can view their prices, but the pans are cheaper than buying Wilton wholesale. I have all my square pans from them and wish I had had access before I brought all my round ones from Wilton.
If you don't have a tax id, I've heard that Into the Oven has good prices on MagicLine, but I haven't ever order from them myself. I've ordered from Country Kitchen SA and their service was great.
I am not a business, just having fun... and recently bought all new round, square and oblong pans. I found the best prices on Magic Line at www.cooksdream.com. If you're buying a bunch, watch for a 10% discount code on the top of the screen. I found one buried way deep for 15% off, but you had to spend a couple hundred to use it. It was UB15.
Edited to add that shipping took about 10-12 days. Also, Amazon has good prices on ML and quick shipping.
www.cakepans4less.com is where I got mine. Quick shipping and great square corners!