Personally what I find the most ridiculous in this whole "debate" is the silly sense of entitlement of the gaming industry (or the media industry in general), yes they don't get money from used games... but it's perfectly normal, they shouldn't !
They sold a license, somebody bought it, if the buyer decide to sell it again it should be his right, as long as he totally transfer the license ownership to the new buyer (and don't keep any copy of the game). But this second sale doesn't concert AT ALL the industry, they already got paid for their work they, don't deserve any extra cents from what happens after.
That's IMHO where todays copyrights laws and/or EULA have gone overboard, companies want's us to buy their work, sorry I mean they want you to purchase a license, but still want to keep full control over it and refuse to make any compromise until forced to do so.
If the used market and piracy are ever "defeated" I am convinced that it will be a VERY bad news for legit customers, that's the saddest thing we often talk about how much piracy hurt the media industries but I think the real question is how much piracy actually helped customers.
If it wasn't as an atempt to fight piracy (or at least lower it's atractiveness) would we have DRM-free music ? would we have the possibility to buy song one by one istead as part of an album ? would we have interoperability (i.e. being able to buy a movie/sond once and play it on different device ) ?
Knowing how much they are control freaks I honestly doubt it, I am even pretty sure that things would be much much worse.
I remember at the begining of the "digital era" the things that frightened the media industry the most wasn't the second hand market, heck it wasn't even piracy, no the thing that terrified them was the "everlasting" nature of digital data, that you could buy a CD (and later DVD) and listen to it for as long as you wanted without ever needing to buy it again. (something that was impossible with TAPE and VHS)