Its not the console itself thats valuable... Its the games, there are many websites that will give you a list of the rares. So far , the most valuable one ive seen is "Mrs. Piggy's wedding" wich is valued at about 1,000$ And assorted others priced at about 100-600$ (It also depends on wich Atari its for, either 2600 or 7800)

"I'm so happy, because today I found my friends... They're in my head..." ~ Kurt Cobain- Lithium

thanks to ask_raber for this sig!