I have a mint/as new condition LM4 that I would trade for the right used, A-necked KPB4 (prefer a nitro finish, but would consider a standard model plus cash).
Jimmy described this bass as "slamming" and "one of the best LMs" he's built. It has a satin poly thin neck with vintage style frets. Beautiful trans white finish. Low hours and as closed to new as you'll get as and no 18+ month wait. Bass is 99/100 condition (maybe some pg swirls but super faint). Slap tone is ridiculous. The only reason I'd consider is that I have a RA4 that can cover my 70s AC bass needs. I am more than happy to keep this if I can't find a trade. I am not interested in a cash sale or any other trades. US, first party deals only.
PM if interested and with all the details/pics on your bass.