Does anyone actually know what the best tool is for tracking eBay price history because I'm totally losing my mind over this right now? I've been trying to hunt down a specific vintage 1990s Nikon camera for my sister's birthday next month—I'm in Chicago and it seems like every local shop is sold out—so I'm stuck with eBay. My budget is strictly under $400 but the prices are jumping all over the place. Like one day a listing is $300 and the next day a similar one is $550 and I literally cannot tell what is a "good" deal or if I'm just getting totally ripped off by some reseller.

I did some digging and saw people mention Terapeak but that seems way too complicated and built mostly for people selling stuff? I just want to see a simple graph of what things actually sold for over the last few months. I also tried CheckAFlip but the site looks like it hasn't been updated since 2012 and it kept glitching out on me when I tried to search for specific model numbers. Is there anything else out there that is actually reliable and won't give me a headache? I'm really worried I'm gonna miss the window to get this shipped in time for her party if I don't pull the trigger soon but I don't want to overpay by like a hundred bucks...