I can't tell you what they are worth, but I did track down 2 old ads. Asking $2600 in 2021, not sure if it sold
https://www.pinkbike.com/buysell/3053396/
This one sold for 1200, also 2021
Located near Toronto Canada
1200 Canadian + at cost shipping.
Great titanium frame
XTR front and rear derailleur
Gripshift shifters
Look Moab pedals
XTR rear hub and cassette
Rockshox Duke adjustable travel fork
Syncros stem and seatpost
Flite saddle
Kona titanium bar
Race face cranks and Bottom bracket
This bike was custom built for me in 1994. Was ridden seriously for a year and then sadly since then ridden only a hand full of times.
I'll gladly follow up with more detailed pictures of any parts for interested parties.
I'm 6'4" and the bike is small on me. I'd estimate 5'10 and...
I would guess the second one is a more realistic price. I've also recently seen Team Marin ti bikes listed at 1200ish Canadian.
There are quality parts on board as well, such as the magura hydraulic rim brakes and race raceface cranks. Is that syncros seatpost also titanium? I would probably list your kona at around $1500, but being late in the season, it might sit for a while, and you will probably receive $1000 offers, so be ready to dicker