Hey. So my friend is selling his iMac G5 with isight computer. I don't really know much about apple computers since Ive owned windows. The only reason I want a Mac its for its video/sound editing software and am not really a fan for windows editing software. I am on a budget and not willing to spend a lot since I want to buy a camera to film movies. He is selling the iMac for $400, is this a good deal? Thanks

Depends how it is configured, but this is a 6 year old machine with an out of date CPU, you can get a refurbished (new warranty) 21" intel Core2Duo based iMac from Apple for about $1000, so you'll have to make a decision.