The BX-300 is arguably Nak’s best “basic” deck but serviced ones are fetching a *ridiculous* $1,000 on eBay, whereas you can get a serviced/restored BX-1, -2, -100, -125, or -150 for $200 or less if you look around.
LX-3 and LX-5 are also good choices but are priced much higher than the BX...