Picked up this Milton Bradley Microvision haul for 20 bucks. I have no idea what it is worth.

The system is in working condition which from what I read is quite rare. It came with 5 games, Pinball, Bowling, Alien Raiders, Phaser Strike, and Block Buster. This system has the distinction of being the first handheld console with removable carts. I cant really find anything on the web saying how much a working console is worth.