One questionable occurrence I see often on eBay is the same bass being sold by more than one Japan seller. Same pics, different asking prices. I never understood what that was about. Recently, I saw a bass I wanted and chose the cheaper one of two using the same pics being sold by two different biz's. I sent a PM to make sure the bass in the pics was the exact same bass and I was assured it was. There was a shot of the back of the maple hs showing a specific grain pattern so that was going to be how I could confirm it was the same once it arrived. I'd never bought a bass from Japan fearing high import fees and long delivery times. They always offer many basses that you don't see in the US and prices vary but some are reasonable. The one I bought was a Japanese market only - so it was never in stores here in the US.
Anyway, no additional import fees and the bass arrived in nine days (very fast despite the current supply-chain issues) and it was the exact bass in the pics. (sigh of relief) I later learned they (multiple sellers of the same bass) are not really businesses. It’s just a guy that reposts something a store lists online and when the listing sells, they scurry over to the shop to try and get it before it sells. The higher price covers their jr railpass and bubble wrap expenses. They are just trying to make some money by acting as a broker and shipping service because some of those shops are not multilingual and do not want to ship international and do not have websites set up for that purpose.
So not a scam, but initially questionable.