Something I have just become aware of is that many of the "sold" items have not actually been sold at all. I ran some auctions and they "sold" for ludicrously low prices. This was before I realized that auctions aren't suitable for many items. Of course, the winning bidders never paid so they actually weren't sold at all yet they show up as comps right next to the same items I'm now trying to sell at reasonable prices. I had one potential buyer text me to ask why "the second one" I'm selling is twice the price of the first one. I had to explain I didn't understand how auctions worked and way underpriced the starting bid and buyer ghosted and I was never paid and that I didn't understand how auctions worked so way under priced it to start with. The moral to the story is that my ridiculously low auctions that never came to fruition, though eBay lists them as comps, is living proof that what is stated as historic sales is NOT accurate. The fact that the auctions closed way too low but never really sold throws off the entire platform. I also know that listings that say ridiculous things like "30 sold, 3 left" is not accurate. I don't know how in the world my listing says I sold 30 as there were only three to start with. I ACCIDENTALLY put 33 instead of 3 and corrected it the next day but when I looked up the listing outside of my account it said 30 sold, 3 left. Don't trust the comps. More on reddit.com

Items that sold are available for viewing for 90 days. Items that didn't sell are only available for viewing for 30 days I believe. More on reddit.com

Yeah, do a regular search as you would normally and then to the left side click the filter for "Completed Items".

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You are looking to see how often your item sells. If its sold once in the last three months for $50, but there are hundreds of others that didn't sell, you probably want to pass. More on reddit.com