Spector custom shop out of Woodstock,pretty vague to only discuss a "$25,000" price tag - depends on what it is.
fodera is known to more or less be the highest price tag, but they top out at around $15k.
most high end/pricey basses are in the $3-6k range - for that you get high attention to detail, customization, craftsmanship, which adds up in many cases to tone and playability. getting a certain look (top woods? unique body shapes?) can get expensive as well.
or over on the DB forum for $25,000 you get a "nice bass"man don't we have it easy?
Spector NS-4 30KBC
NEW 32,000 YEAR OLD BASS
The NS-30K BC utilized what
is believed to be the oldest
wood ever used in the
construction of a musical
instrument. Obtained by Spector from logs discovered
buried 40 feet deep in a
sand quarry in Georgia, USA,
the wood is perfectly
preserved, due to the
sterile nature of the sand
and the natural decay
resistance of the cypress
wood itself. Using carbon
14 testing techniques, samples of the wood were
examined by Beta Analytics,
in Miami, to check for
radioactive decay in the small
amount of carbon that
is present in all living
organisms. This wood was
dated as 31,970 years old,
plus or minus 570 years.
I imagine in the hands of the collector that own this limited bass more than likely would fetch at least if not more than $25K these days.

Absolutely PRICELESS!