so i was backing up down a drive way. left tire fell off. Big Crash. pushed it back on to the road and there was a puddle of oil. i figure i busted the axle housing? how much yall think this is gunna be?

 

Check your local craigslist and the junkyards, you can probably find one for somewhere between $150 and $400. If you have a good set of wreches and sockets it'll take an afternoon to swap, its not too hard. Make sure the gears on the one you get are the same as yours if your truck is 4 wheel drive. Also, make sure you get a 4x4 rear axle if you have a 4x4 and vise versa if you have a 2 wheel drive.