Welcome David.
Well, that's literally the $10,000 question now.
I can only tell you, that's more money than I paid for my Custom fretless 5-string bought new in 2017, and while this one has some tweaks and switches my bass doesn't, it isn't that much more bass. I could almost justify the asking price if this were a Series instrument, but it isn't. Beyond that, it's apparently a Shopnight build, obviously by a very skilled Alembic employee. It has a logo and a serial number, which grants it a bit of legitimacy beyond just being a well-crafted bass. I think the asking price is about double-plus-something what I'd expect to pay for this bass. My guess is they would accept a lesser offer. I seriously contemplated a guitar they are selling a while back, and thought better of making the offer.
Again, Welcome. Now, how about posting some pictures of that Brown Bass in the Showcase?