Their recent activity is pretty sketchy, yes. I doubt they started in 2012 leading up to a big scam in 2014, but maybe saw an opportunity and ran one.
Honestly I think something is up. I'd call both eBay and PayPal. You didn't get scammed out of any $, if you bought on eBay and paid via PayPal - they did. You'll get your money back if there's an issue - that's part of the ~12% cut they take.
It's not uncommon for gift cards to sell for at, or above, face value...I've seen it mostly on iTunes cards (buyers not in the US mostly) - haven't figured out the why, but they do.
DanM might be able to "request seller information", which will be emailed to him, and the seller will get the same information about DanM in return (name, address, email, and phone #, last time I did it).
Yeah, two years seems like a little much time to put into a con, but I could see somebody jumping on an opportunity. I did request seller information, but haven't received anything yet. Wondering how long that process takes.