Some of the best deals on Turbo games I got on eBay. I bought a single lot of games in 2008 that included Magical Chase. The other three games were games I already had, so I sold them off. When all was said and done I'd landed a complete copy of U.S. MC for $165. Within the past year I traded the box (!!), which is essentially worthless to me, for complete U.S. copies of Bonk 3 CD, Cotton and Dragon Slayer. Some simple math reveals that in the end, I ended up with MC, Bonk 3 CD, Cotton, and Dragon Slayer for $165.
I think it's funny when people say games like DH and MC rarely show up on eBay. I see these games pop up for sale frequently, often multiple times a month. While it's true the cheap ones don't stay up for long, they do show up. One need not "die of old age" before nabbing a good deal on this stuff. If that were true, I'd still be waiting for good deals to come along.