The most expensive bass I ever bought and owned was a vintage
Rickenbacker 4003 (might have been a 4001, not entirely sure) years back, that I relatively quickly ended up absolutely hating, because it's neck felt really uncomfortable for me to play on.
Next most expensive was a
Jerry Jones Neptune Longhorn bass (sort of a high end, "boutique", version of the Danelectro of the same name) that I absolutely loved.
But I own neither of them anymore.
The Rickenbacker eventually got stolen, after having been banished to a case lying under the sofa at our rehearsal place at that time, and while I do regret loosing the resale money I didn't and still don't miss it one bit, first and last time I buy a Rickenbacker that's for sure, complete waste of money.
The Jerry Jones Longhorn, as said, I loved, but despite that, and much to my later regret, I was still stupid enough to sell it at some point.
I guess the most expensive bass that I currently own would be an
Aria Pro II Laser Electric Classic, made back when their production was still located in Japan, though it was one of their cheaper models, and though it sounds and plays amazing and is of pretty serious high quality the resale value is not all that much, still probably the most expensive bass that I currently own.
My cheapest bass would be an extraordinarily crappy late 60's cheap budget and totally unplayable and horrible sounding
Egmond short scale bass, made of the absolutely worst quality laminated wood, with exceptionally bad pickups and a totally banana bend neck with a stuck truss rod.
Next cheapest would be my
Ibanez GSRM20 Mikro Bass, which I love as much as I did my Jerry Jones Longhorn, and which is my current main bass and have been so for the last past 10 years, ever since I got it back in April 2011, though if you count in all the mods and upgrades I did to it (most noticeable: A P/J set of EMG Geezer Butler pickups, then a DiMarzio Model P, then a GSRM20B Mikro Bass super light mahogany body in Weathered Black finish, and most recently a brand new EMG Geezer Butler P pickup) it would end up as my currently most expensive bass, hands down.
Here's a picture of my
Aria Pro II :
Here's one of my
Mikro Bass :
And here's the only photo that I got of the vintage
Rickenbacker that once owned, the most expensive bass I ever bought (pretty crappy photo quality, being a magnified section of a photo of an old newspaper cutout, depicting me playing the Rickenbacker at an open air gig with the noise rock band I was currently a part of, called "Prune", back around the mid 90's. And I think this possibly was both the first and the last time I ever played it live, from before I ditched it and went back to my trusted Aria Pro II, banishing the Rickenbacker to a case under the sofa at our rehearsal place, until eventually it got stolen) :