They just came out with the RK2020. This plays all the way up to Dreamcast/NDS/NAOMI(Dreamcast hardware in the arcades). Thought it was a great deal too. They're going for as low as $80. Depending where you get it from they do come packed with games. The one I saw that had a 128gb card was offering 15,000 games sold with it. This is obviously illegal but it comes from China where they don't care.
Here's a review on it.