Devs are certainly TRYING to do this WITHOUT lowering the price.
Indeed. It's succeeding to a certain extent (Steam), I would argue for largely psychological reasons. Not ALL used game sales are premeditated as I described. Some people buy games with the intent of keeping them forever, and then end up changing their mind and selling. Some people might not actively consider the difference between physical and digital copies (in terms of transferability) when making their initial purchase.
What if games couldn't be re-sold but cost $40? 2 people still buy the game, but the Dev gets $80 instead of just $60
Also technically true but beside the point. Also, the person who buys the used game for $20 wouldn't necessarily be willing to buy it new for $40.
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