Why are classical solo cello LPs so expensive?


I am trying to collect cello LPs, mostly solo (like Bach's 6 cello suites) and sonata (Beethoven's, Brahams), and some concertos. But they all seem to be far more expensive than for other instruments.
Bach cello suites by Janos Starker seem to be one of the most expensive. DuPre's cello works are all priced high.

Is it a known fact that solo cello or cello sonata LPs are highly sought after and very expensive? If it is, any particular reason?
For me, most cello recordings sound so good with LPs, much better than CD recordings. I don't feel such on the piano or violin. Are most other people like me, which is why cello LPs are sold at high premium?
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There is also a low supply in addition to the demand.

For example, I really want a copy of the Casals Bach solo cello suites (in a 50's or early 60's pressing) and I have not yet located one that wasn't in mediocre shape.

Still looking. I am certain to become one of those fools paying an obscene amount, no doubt!
Raul, this is what has been reported to me over the years by two different used classical music dealers from whom I regularly purchase LPs. It also matches what I see in the eBay auctions.
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Dear Rushton: Thank you, seems to me then that that kind of music is almost the East land " signature ", fine.

rgards and enjoy the music.
Raul.
Well, not only for Starker's and DuPre's, but many cello LPs from Casals, Fournier, Rostropovich, Myski, Yoyoma, Bylsma, ..., they all seem to be much more expensive than for other instruments, including violin.
I just wonder why. Collectors in Asia may be one reason, but I am not sure if it is one of the bigger reasons.
Sure, the supply and demand work here, but why so much demand? Maybe, cello LPs were produced in much lesser volume compared to other instruments? Then, it may be an answer. Other than that, the only I can think of is that, vinyl lovers love the cello sound on LPs and try to grab as much as they can with top dollars.