I'm stuck way back on 10.5.8, my little Intel iMac is running like a dog's dinner & I've had enough. I know I don't need the very latest OS, but I know I need to upgrade. I also have a very low budget. Can anyone suggest what might be the easiest & cheapest way to cobble together a new OS from second hand OS discs, probably from eBay or somewhere, then maybe go for an upgrade from the Apple site? Do they still offer upgrades for older OS or is it all Lion/MtnLion nowadays? Cheers.