Pop Vinyls, like their Amiibo cousins, are vinyl figures created for fans of franchises. Unlike Amiibos, Pops cater to more than just games. Movies, TV shows, political candidates - no stone is left unturned. If there is the remote chance that someone likes a fictional (and sometimes non-fictional) character, there is a Pop for it.
People like collecting things with numbers on them. It's a character flaw in just about all of us. Almost every Pop also has a number and that allows you to easily create a checklist of characters missing in your collection. Some Pops are worth a fair bit more than their retail price and you'll find those below: the rarest Pops and the most valuable Pops!
When I see lists of expensive Pops, I often wonder "Why is this Pop rare?" Sometimes it's because the Pop had a low print run. Sometimes it's a limited edition. Sometimes it's just an ugly unpopular Pop! (my favorite)