Video Game Heaven has a good selection of games on most systems including the 3DO, Turbo, CD-I, Jaguar, TI-99, and a whole display of imports. Some items are quite steep and can exceed eBay prices, but a majority of their inventory is fairly priced and you occasionally find an incredible deal or rare item. Their inventory gets stocked off trade-ins and crazy bulk orders on eBay and other sources, hence how they get some interesting titles and systems. It's owned by an older couple and they hire kids (17-24 year olds) to operate the store and are nice, friendly people to chat with. One of the guys has arcade gear (which sometimes pops up in the store too) and shows up at local arcade, pinball, and other gaming gatherings.
It's worth a good 15 minutes of looking around.