Originally Posted by gz76
an Ortofon MC20 on what could be a Grace arm (need to double check). I believe you can get different arm-boards for it tho,
You'll probably want to make a new plinth for it anyway. Most of these old arms are only worth money to collectors really so don't over pay for one. If you get it thrown in for a reasonable amount then so much the better as you can usually sell them at a profit. In performance terms a Rega RB250 will be as good or better especially when you take into account cartridge matching issues.
On that score, as far as the MC20 goes it'll probably need a re-tip which is going to cost more than a decent modern MM so don't pay anything too inflated for that either. Modern Ortofon MC's like the Rhondos are in another class altogether.
It's all in the link above anyway.