Sigma 500 Super - Where to buy?

I was wondering where is the cheapest place that I could find one of these units for sale?
When I search, I only find units for nikons.

Try www.froogle.com perhaps. Do they sell the 500 still, or just the 530? I buy everything from B&H. If you just want a cheap flash there are other options, search for ettl ii at B&H.

I was going to say sigma4less, but it looks like their ef-500 is out of stock for canon. They do have the newer ef-530 though