Sign me up.. But I've pretty much grown to hate my 87' Thumb (NT)
The reasons why I want to get rid of it:
I cant play it while standing, because of neck-diving.
I cant play it while sitting, because this part is too short:
I'm not really getting the sound out of it that I'm looking for,
but its not really that bad. I'd give it a 7 out of 10 soundwise.
The reasons that make me want to keep it:
While its hard to play in any position, its still the most comfortable bass I've ever played (neck-wise)
I may grow to like it afterwards and I'm pretty sure I wont find a model this old again
I also have a Thumb NT, and I agree about eveything you said, especialy it being awkward to play standing up. But I find if you shift the bass around more to your left (so the bottom of the body is more in front of your unmentionables) and stick your left leg out slightly, so your body is slightly at and angle, I find this reduces the neck dive.
But I'd keep yours, at least for a few more years. I find early Warwicks are more and more being sought after. I myself made sure I bagged my thumb that was made before they made the switch to the ovangkol necks and "plastic" Wilferite nuts.