[En Sabah Nerd]

Seeing the 3 Thanos figures together is pretty clear: the original Thanos is sad and has a face that says "even I know this isn't really me." The only gripe I have with the SDCC Thanos (and this is really nitpicking) is the lack of armpit stripes. Those are minor details that aren't even always in the comics anyway so that's a very small gripe at most. The very original doesn't even have the torso stripe, it's like whoever designed the figure and what not didn't even look at the box art (which I imagine was seen along with the figure before final production).
Enough ranting about an old figure that has been redeemed (twice now). A walkman, well I don't have one (sorry), I guess it's more for the retro-feel than practical use. Portable music players have only gotten better over time, they're not like record players (or phonographs if'n yer fancy) where the sound is "richer." Even cheaper modern headphones and players are likely to sound a tad better than a walkman, but if a walkman is what you're looking for you probably shouldn't go to Ebay, the movie has given the walkman a huge nostalgia boost so that's likely to be frustrating.