I may be wrong, but to the best of my knowledge, Jens doesn't have a price list posted on his site. I've had a couple of exchanges with him and Christophe and it seems you can pretty much order any of the Ritter bass models with whatever spec you care to dream up. Some of the Royal Family basses have gemstones and/or precious metals set into them, so you could easily spend above anything that has been mentioned here already.
I also had a conversation with Mica at Alembic a couple of years ago around ordering a Spyder bass. The quote was over $20k; $4k of that was for the silver spider web inlays. I managed to pick one up second hand a couple of months ago for considerably less. Given that it has hardly been out of it's case, I'm glad I held off.
Regarding Fodera. Some people like them, some people don't, but for me the Monarch is almost my perfect bass. I've had a few and they have all been outstanding.