I suggest you favorite the NGC world coin site that gives values images mintage ect. Its not perfect but will help u alot more. This is for all non-USA. https://www.ngccoin.com/price-guide/world/
Yes, anything showing a nekkid tushie is good. In all seriousness though, these are pretty common. The basketball medal doesn't look like much either, unless you can find an edge marking and/or signature on it. Without anything specific it would likely only appeal to medal collectors who go for sports themes. I'm sure you're getting overloaded with advice to either get/look at Krause (paper vs. electronic...for something like the project you seem to be working on I would suggest getting a slightly out of date paper one to flip through and get a rough idea on values) or use an online tool. Being new it might be hard to use the online resources without first knowing what you have which is why a paper one to flip through might be better. Plus the paper ones have a section on commonly used motifs and which country they belong to. A used book store (if you can find one) or a coin shop might have an old one cheap. Going by your postings getting one that covers the 20th century would be a good place to start. Or, the library, they might have them. Or, eBay.
