Irrelevant whether you have the right or not but there is an obvious difference between reselling a house and reselling games.
When you resell a house most likely you will replace that "product" with another house or another apartment. If you sell a particular game or not, you dont buy it again. You just reduce a unit of sales for the developer because its you who sold a unit and not him.
Indeed, and such sales especially when it comes to the way its handled in gs or eb is harmful to the industry.
A solution for this might be to further weaken the disc's protective layer, such that careful or normal use will lead to indefinite functionality, but abnormal use will lead to irreparable failure.
Given most individuals are basically 'retarded' when it comes to handling optical media, it need only have a decent threshold of dmg tolerance for such abuse(say a few months of negligence.) to appease customers, with no way to repair it (no polish or the like, maybe requiring proprietary or patented methods to repair cost effectively) should it be damaged.
This way the customer gets what they want, and shops are unable to sell used games.(at least in the united states, where most dvd games are scratched to hell.)
Another method might be to have a degradable section of the disc with information that gets tied to the first 2-3 consoles(with the different consoles using their laser to heat and erase portions of the data each time. After 2-3 plays in different consoles, the game can no longer be played in any other console. The validation key could be tied to say up to 2-3 users' online id's so that they can transition from console to console without problems or erasing data.).
Such would make it possible for a person to sell it once after buying it, and to use it indefinitely in as many consoles as they wish. But would cap stores from hoarding and reselling the same game again and again.
DDs with copyright management is another way. As are crippled online features(ala, mmorpgs). It could also be made such that a significant part of the game is not playable until it receives a validation key online, and that such keys are limited per copy of the game.
The move from cartridge to discs helped, but the ability of used games shops to easily polish away scratches hinders the full potential of optical media at dealing with this problem.