Even if you do, it hardly matters. I bought my car new and sold it used for less money. It's very common to buy something new then sell it when you're through with it.
Why would you expect to get what you paid for on resale?
Old things aren't worth as much, generally...
If he got his games in a bundle as he stated, and the bundle do no longer exist,, he could resell these games at a price closer to the standalone price, usually higher
This will guarantee the death of those bundles. It will give a few hundred dollars in profit to whoever bothers to collect on the resale arbitrage and change the sellers landscape for a decade or more.
I used to make money doing this by buying games from the humble bundle, waiting for the price to go up on G2A, then reselling them