Ebay advice, suspicious bidding?

[incoherent]

Hey folks, I'm an ebay n00b so hoping someone can give me some info/advice. (feel free to point me elsewhere if this is the wrong forum!)

I was bidding on a lot today sold by (say) PersonA. I'm in the lead with a bid at $20. Around 20 minutes before the listing ends, PersonB places a high bid that ends up topping my max bid at the time, so now the max bid's around $50 and they know what my max bid was. Then I get an email saying PersonB retracts their bid (wait, what?). I'm the high bidder again, back at $20.

About a minute before the auction ends, PersonC (with zero feedback, zero bids on any other stuff) places a bid of $40, way over my $20 high bid. No automatic bidding or anything in between, just a big jump from 20->40.

I end up winning the auction at ~41, but the suspicious jump in bidding from a zero-feedback guy, plus the retracted bid, makes me feel this is a tad sketchy. If I report the listing and ebay determines the seller was shilling, what happens? Would I still receive the item, but at a corrected price? I still want the goods, but it feels unfair to have (potentially) overpaid by 2x due to fraudulent bidding