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Hmm how expensive is it to get into it? Like how much does a Sega CD run now? And is it hard to find one that works?

The model 2 is the most efficient model, pending you have a model 2 Sega Genesis. They can be a bit pricey, but it's worth noting that it does play burned CD games so you can experience games like Snatcher and not have to pay $700+

Hm I have to get myself a model 2 genesis then.