In between Tampa and Orlando is a town called Lakeland (where I am from).
In the Lakeland Square Mall, there was a used game shop called Retro's. It closed in January of this year.
They had great stuff....used games from Atari 2600, 5200, 7800, Intellivision, ColecoVision; even a Vectrex!
Of course NES, SNES, Sega Master System, and other ubiquitous game console.
I really padded my retro collection from that shop. Unfortunately, the cell phone accessory/fake gold/bling-it-up crowd that frequents that mall did not appreciate retro gaming.
From what I understand, there is a great retroshop in South Florida (Miami - Ft. Lauderdale area) but I cannot confirm that.