turntables

Dear @handymann : " keep the 51 ".  Depends on what the OP is looking for.

In the other side the 51 and 71 are not similar TT. The 71 had a way better tonearm and I mean by a wide margin and its motor was better too. You can't compare in between and think that in both TTs he will has same quality level performance because it's not that way.

Regards and enjoy the MUSIC NOT DISTORTIONS,
R. 

Dear @g_nakamoto: Mainly depends on what level of quality performance you want to listen and how many LPs you own.

Pioneer design good, very good and excelent levels of products. Your TT model is not really in any of those levels for today standards, it has really poor measures as specs.
Of course that can works at some limited quality level performance. Its tonearm is not good neither.

You can get an inexpensive Pioneer vintage TT looking at the 600 series, as the PL 630 that's very good motor with good tonearm.

As I said all depends on what you want.

Regards and enjoy the MUSIC NOT DISTORTIONS,
R.