Tanks are almost the same price no mater where you go. When I was looking for a 55 the biggest price difference I seen was $10. I finally got mine at a very small local store for $69.
I believe he sells his 75's for $109. Not too bad of a price. The store is in WPB off of 10th AVE. A little bit of a drive from Miami.
There is a nice store in Boca also off of Glades RD. A little less of a drive but his prices are a little more.