I've been looking to buy Super Street Fighter II Turbo Revival for Gameboy Advance, so I bought a 3 game lot including it on Ebay for $8 including shipping. The second game was Monster House (which I didn't care about), and the third game was listed as "unknown" as it had no label. I guess the seller had no way to test it, because the"unknown" game turned out to be Super Mario Advance.
It's not a rare or valuable game by any means, but it's a really good game that I didn't already have so it turned out to be a nice bonus. I found a decent picture of the label, and I printed it along with a TCP cover for my collection.