The SP-10 is the cheapest in Technics SP series, for price sratistics check ebay for sold listings.
Personally i would avoid SP-10, look for SP-20 which is much better and closer to SP-10 mk2, but still cheaper than mk2. The SP-20 is very rare, it looks exactly like sp-10 mk2, but in a nice black finish (33/45 switch is different, no 78, and no external power supply). I have both SP-10 mk2 and SP-20 (which i like very much).
Pricing sp-10 over $300 is nonsense. While the sp-10 mk2 in perfect condition should be arround $900 and SP-20 somewere in between.
Personally i would avoid SP-10, look for SP-20 which is much better and closer to SP-10 mk2, but still cheaper than mk2. The SP-20 is very rare, it looks exactly like sp-10 mk2, but in a nice black finish (33/45 switch is different, no 78, and no external power supply). I have both SP-10 mk2 and SP-20 (which i like very much).
Pricing sp-10 over $300 is nonsense. While the sp-10 mk2 in perfect condition should be arround $900 and SP-20 somewere in between.