RegaPlanet Original vs RegaPlanet 2000 vs Jupiter?

Hi all,

I am in the process of sourcing for a CD player at the moment. Is it worth paying 2x more on the "used" market for a Rega Planet 2000 as opposed to the Rega Original? As I understand with most consumer-grade electronics, they have built-in obsolence calculated in them. Hence, buying a 1998 CD player might not seem like a wise idea after all.

Advice highly appreciated.
BTW, I am using a cheap 1997 harman kardon $250 HD710 CD player right now...