Depending on condition and assuming it's an 100% working player, 1,800-2,200

I sold one last year with the topper for $2k, but it was a "friend price", I had it listed at $2200 and had interest, pretty sure I could have sold it for that.

No topper will hurt. Plastics are pretty much impossible to find, so check the condition of them. The scoop wear on JP can be bad, factor in that you might have to build it up to even hold a cliffy.

I looked at a project JP for $1k a few months back. No topper, decent playfield, incomplete shop job.

One in nice complete playing condition, no errors, working T Rex , reasonable cabinet will not go for less than 2K. When you look at what is selling in the $1800- $2200 range, it would be difficult to find a game that will give you more shots / longevity for the money ( JD prolly exception). GNR & JP are the apex of DE design IMO.