Just start budgeting better for the future. If you sell the Wii, PS3 or 360 off you'll most likely spend even more money purchasing one in the future.
My suggestion would be to create an games budget for yourself, something like $120 a month. For a while I was also spending a lot of money on games, movies, etc. but after cutting down to 1-2 new games a month I've been able to save a lot more.