There’s still quite a bit of turntables around. If your collection merits it, buy only a direct drive model that doesn’t use belts. By the early 80’s they got pretty cheap. Stay away from the older changers that you could put a stack of records on. They’re usually made by BSR or VM. Some model of these was used in virtually evey integraged component models or inexpensive sets. These use a number of idler wheels underneath that have most likely hardened and not worth bothering with. The early 80’s brought direct drive,single play turnatables to the price point that the average person could afford. If you do find one that uses a single belt for nothing, there was a company called projector-recorder belt company that sold many replacements. If the belt is stretched, but pliable, some models do allow moving the motor a bit to make up the difference. You have another issue to deal with. Most of those better turntables used a magnetic cartridge. Unlike the cheap changers that used a ceramic cartiridge with that flip over needle, these need a pre-amplifier to bring them up to the same level of output as a regular component. You might be able to use the microphone input on a sound card to get that extra level of amplification. Magnetic phono inputs on older stereos had a different equalization charactaristic then a microphone. Your sound card software may have a means to accomodate that by checking RIAA Phono curve or something like that. If it doesn’t, no sweat, you probably can use the graphic equalizer function on playback to make it sound to your tastes. Just keep in mind you’re going to need more amplification for one of these cartridges if you don’t already have an old stereo or preamplifier. Your soundcard may require you to move a jumper on the board to get more amplification. If the cartridge is shot, again no worries. Places like MCM and many places on the net have inexpensive cartridges that perform like one that you may have had to pay nearly $100 or more from Shure or Graco in the 70’s. Don’t sweat this. Plenty of old junk in working condtion around. To get around the amplifier, see if anyone around has an old stereo or even some stand alone microphone mixers that DJ’s used had a phono input. Have you thought about a rental from a DJ supply? If you just want to convert your records and have the time to do it yourself, this may be the way to go.