Some thoughts on eBay prices--
1. Asking prices mean NOTHING! The only prices that have any meaning are "sold listings". Depending on App / browser you have to click a little differently to get there but you can always find sold listings.
2. Then another another click to organize / sort by "lowest price first, including shipping"
3. Even then, many prices don't mean anything due to ebay tricks like showing you items that sold with "best offer" but only showing what the original asking price was, NOT what the accepted offer was.
4. If there are many sold items it might also be worthwhile to sort by "highest price first". If there are rarities to be found within the group you might identify a sleeper.
5. Interesting also to do the search for "completed items" (not sold) by lowest price first. Sometimes you find everybody trying to sell an item, some very reasonable, and NOBODY is buying. If I'm researching something to sell and find that situation-- I give up and it goes in the load of stuff headed to the consignment auction. Where hopefully the folks watching pawn star / pickers / storage war shows may get into a bidding war thinking they are going to $$$ in big!
6. Sometimes you see a few "sold listings" for common items at insanely unbelievable high prices. It's possible there are a few buyers with too much money who just decide they want something and place an extremely high bid knowing that nobody else in their right mind will bid anything close. That maybe worked a few times in the early days, (there was a name I've forgotten for that tactic) until you get 2 bidders trying the same thing! OR- sometimes Store Sellers go on vacation and simply edit their listings by adding a couple zeros to price to get exposure but prevent them from selling while they are gone. I wouldn't put it past ebay to "fake" some of these to appear as "sold" to sucker people in. Anything they can do to squeeze more profit is fair game in their book. OR-- Maybe sellers have their cronies "buy" something for big money, then "return" it, and get fees credited. It still shows as "sold". Then they sell it again for less to someone who thinks they are getting a deal.
