I know a number of people who resell their games after they've beaten them (or played and found that they didn't meet their tastes), but I also keep nearly all of the games that I have played in the hopes of either playing them again (as mentioned in an earlier post) or for my children to play. This includes games from systems as old as the original Nintendo (although an unfortunate number of those have been lost during one of my many moves). I tend not to play anything older than the PS2 era (and that infrequently), but some of these older systems have still seen a good deal of use as my children rediscover some of my old favorites (especially on the SNES).
Thus, taking Mario Party 10 to resell at Gamestop yesterday was rather out of character for me. I have sold off games before, but most were ones that I had duplicates of or that went too far against my sensibilities. This one was just bad. I really wanted to like it too. I tried to convince myself that I did like it. Unfortunately, while it had fun elements (the mini-games were some of the best), its terrible board design and overall game concept made the fun parts few and far between. No one in my house wanted to play it together after the first couple of tries, a fact which is the true death-knell of any "party" game.
Game companies have tried to stop the resale business in a number of ways, and I understand their motivations for doing so. Yet, while I usually don't avail myself of the opportunity, cases like this one with Mario Party 10 make me glad that the option to resell video games is still available to me.