Used games depreciate more like used novels--they still work fine, minus some cosmetic wear and tear, but they lose their relevance because they rely in large part on timeliness and novelty to surprise and engage the user. Once a game or novel is surpassed by newer and better product, or once the surprise has been spoiled by wide dissemination, the consumer places less value on it. GTA 3 lost almost all its value by the time San Andreas came out, and those old Stephen King novels don't find many new readers these days. Especially in the case of games, new technology and new conventions render the old obsolete.
Cars experience the same sort of depreciation just by sitting on the lot for too long. Would you buy a never-been-driven 1992 model of [insert favorite car here] for what it cost new? No. You could get something more efficient, more powerful, more stylish, and more featured for the same price.
Trying to curb depreciation by screwing the consumer out of things he's used to is the worst way to go about it. You need to add value. If you have to rely on restricting the consumer's market power, someone who is making products that people want to buy is going to eat your lunch.
I don't understand where your going with this. I don't see any company screwing the consumer out of things they are used too. This isn't used books or used cars. These are the exact same product being repackaged and sold sometimes days after it was just released for less than a new product.
Used cars work because 1) cars eventualy break down and need periodic maintance which benfits the producer of the car. 2) newer cars are out that offer better features , newer modeling and what not .
If you look at the used car market in the early 2000s (mabye late 90s) dealerships and car companys started offering used certifed programs. This was a way of combating 3rd parties from making moeny off used cars. You also don't see a 3 week old car sitting on a lot used for less than the cost of a brand new one. It takes months and most likely years to see used cars of the same model year. Most likely when they come off lease.
It doesn't work with used books either. Used books aren't a big deterent for new books. most of the time on paper backs your looking at a 2-3 price diffrence and with paper backs the quality of the spin and pages is sub par after a single reading. The value comes in with hardcover books. Those often retail for $20 or more and the used verisons are $10-15 less. But that is what the paper back is in answer too (amongst other things). It comes out a few months after the hardcover and is priced cheaper.
Games don't have these options. Games only have price drops to help recoup sales , however there is a used copy already on sale at a lower price point. Its actually hard for me to think of a single product creative product that doesn't have additional lines of revenue . Music not only has cds and digital downloads , it has concerts . Movies have thearters , then dvd , then premium cable / paper view and then basic cable in which to profit off of. Games don't have this chance. So what are they to do about it ? Right now they are adding additional content bundled with new games to get someone to go out and buy it new. I don't see how this is a problem , the other day I bought cinderella on bluray and they gave me a little alarm clock that my little cousin is in love with it. Is that a thign that used dvd buyers should be upset with ?