I think you can do it for free if you already have a TT or access to one.

Assuming your AV receiver has a phono input, you can use that in conjunction w/ the TAPE OUT or REC OUT. Take that analog output and connect it to your PC or Mac input and use a recording app to convert it to a WAV or MP3 of your choice.

The only cost may be a cheap analog cable to get the RCA outputs to your sound card inputs. IIRC, didn't you just build a really nice tower? If so, then I assume you've got a pretty decent sound card.

If you have a Mac, you could use Audacity, which is pretty easy to use.