No, that would be a pirated copy. Go buy it in a bargain bin for £1 or go on ebay. Or you could spend 1200 Microsoft Points and buy it on Xbox Live Marketplace.
I would say that depends really, although I like to buy games new I’ve got a couple of 360 games off ebay in the past at the fraction of the cost which have been in near perfect condition.
so true i bought it a target brand new and installed it on about 2 diffrent pc's andd when i had to reinstall it it kept giving me a error and would just stop
I must say that I buy a lot of my games second hand. In the US we have a store called Gamecrazy where you can trade in games for store credit and use that to buy other games, used or new. If a game is used I usually get it if it has just been released because that means it is probably in good condition. I have never had any problems with a used game I have bought.
If you buy all your used games in store that's probably because the store tests the game to make sure it works before reselling it. I've bought a few used games online and so far everything has worked.