The crippled hard-drive less X-Box 260 can be found for the same price as a Wii, but that's a pretty dumb thing to buy.
And, um, yes, something that is tied for the lowest price is, in fact, 'pretty cheap' by any sane person's conception of 'pretty cheap'.
And you will notice I pointed out two reasons to get a a Wii. They are priced 'pretty cheap' and they have the kind of games that you can't get on a PC or other consoles, casual multi-player games. (Whereas you can get the same kind of games on the PS3, Xbox, and the PC, although not always the exact same game. The exception might be Guitar Hero style games, which are only on consoles, but, hey, only need one of those.)