The R30 is a receiver; this is the tuner forum, just so you know you are asking about vintage solid state audio in general.
Some on the forum here (including me) have found plenty of great deals at local thrift stores. So it depends on your selection situation and how much you already own and are using and where. For 9 dollars, its better than any sound source you are going to find at any retail outlet, again, for the $$.
Its a risk free purchase, without shipping charges. I had an R50 (there was an R70 also), and used it 25 years, last powering a set of Yamaha NS 670s (from a thrift store in Santa Barabara). Bought at the BX at Beale AFB, Ca. Would not have paid retail for the Yamahas, but didn't have to (they were $50 for the pair), and they were way better than the Sansui speakers that came bundled with the R50.
I think what others are saying is if you are just getting into the hobby, keep looking, and spend at least a tank of gas worth at the thrift for something more.