Qutzee

Hi there I have just inherited my grandpa's 2600 collection. It sure brings back memories of when were were kids playing pacman and frogger for hours and hours. I have quite an extensive collection some with instructions all without boxes plus controllers and paddles. I have been pondering selling it since the novelty has worn off. The collection consists of 28 games with a couple of duplicates and a weird control pad for one of the games I don't remember which one it belongs to. Anyway I was wondering if anyone had any ideas of what this collection could go for in auction? I've been doing some research and I read that a guy just sold his system for 7,000.00 but he had some 300 games in boxes. Help if ya can thanks