In my estimation, the problem here is self inflicted by the game publishers. When you charge, if accurate, $55 for a 60 buck retail game, you force the hand of sellers to look for other ways to supplement their revenue stream. If the wholesale price was half that, with a suggest retail price at, let's say, $50 bucks, everyone makes money from new sales, it undercuts the profit margin on used sales and trade in value, which makes that option, from a retail perspective, less attractive.
When I had much more disposable income, I rarely bought used games, with the exception of a buy 2, get 1 deal occasionally. Now that I have a bit less to "waste" as my wife would say, I rarely buy a new game and, instead, wait for some used copies to hit the market. It just makes more sense: $60 and tax vs. $49 and tax (or less). Plus, when I buy used, if it's a game I end up hating, for whatever reason, I can exchange it for something else, when I have done a couple of times over the years. It's a safer expenditure in an economy where proper delegation of every dollar counts....
