Does anybody know how much an Atari 2600 is worth?

The prices on ebay vary a lot. Mine is original, has 16 games, 2 controllers (although one is sticky), two driving paddles, and original adapter. I also have the connector to make it compatible with modern televisions. I saw one that somebody is asking 150 bucks for, and another for 180 (it's a "heavy sixer"), but some are 30-50 bucks. Any ideas?