>>1638269Things to look for
>Tange/Prestige steel frame - minor surface damage is fine, light rust, scratches etc, check for anything more serious like cracks or holes.>Rigid front forks>Deore/DX/XT/XTR componentsPrices vary, check the usual places online, ebay, gumtree, Craigs list etc, also local ads, scrap dealers, yard/car boot sales and second hand shops. There's an element of luck, but be ready to move quick if you are sure you spotted a bargain, fairly easy to trade yourself up if you get lucky early on.
Also it helps to have an idea of what you want, lurk on forums such as
RetroBike.com, if you're in a hurry you can buy excellent bikes from people who know what they have and how to maintain them, but they come with a premium.