Interesting development

Many years ago, Mobile Fidelity had a retail outlet in Sebastapol, CA. We visited and purchased many favorites at $13.99 each. A few years ago, I sold them to a used record store dealer for $50 each. He was thrilled to get them, and I was thrilled to have sold them. I recently got back into vinyl and regret selling them, but the profit helps ease the pain.

About twenty years ago, I found and bought a still-sealed Mobile Fidelity copy of Rickie Lee Jones for $6 in a used record store. I saw it recently advertised here for $250. Now that’s inflation, or is it just supply and demand?

I don't think it's really new, but the prices do continue to climb.  It is supply and demand.  The "reissues" you mentioned are (mostly) high quality, numbered limited editions.  Some are not so popular and if they are still readily available they will sell at MSRP.  If they sold out within days or weeks of their release, good luck finding one at its original MSRP. 

Same thing happens with Record Stored Day releases.  If there are only 2,000 copies of something popular, you'll see them at double their price within hours of them going on sale.  Go look at prices for the RSD 2020 Black Friday version of Let It Bleed.

+1, big_greg

Both MoFi and AP issue their pressings in limited runs. Call it a marketing ploy to keep their LP’s in demand or reseller greed.

One example, I was keeping an eye on Norah Jones - Come Away With Me for last 6 months. It was ‘awaiting repress’ at the major retailers, eBay and Amazon was selling the AP pressing for $70 or more. As soon as it became available, I grabbed a copy for $35.00.

Another prime example is SRV’s Texas Flood, the 7000 run of numbered copies already sold out. And Elusive is now price gouging on the few remaining copies,

https://elusivedisc.com/stevie-ray-vaughan-and-double-trouble-texas-flood-numbered-limited-edition-1...

And not to mention, Bill Evans MoFI Super Vinyl release,

https://elusivedisc.com/the-bill-evans-trio-sunday-at-the-village-vanguard-180g-45rpm-2lp/

https://elusivedisc.com/the-bill-evans-trio-portrait-in-jazz-numbered-limited-edition-180g-45rpm-sup...

I paid $35.00 for this amazing DXD CD when it was available, 
https://www.amazon.com/What-Wonderful-Tsuyoshi-Yamamoto-2009-11-17/dp/B01JT23MS6/ref=sr_1_12?crid=1C...

About twenty years ago, I found and bought a still-sealed Mobile Fidelity copy of Rickie Lee Jones for $6 in a used record store. I saw it recently advertised here for $250. Now that’s inflation, or is it just supply and demand?

Everyone wants to pretend its one thing. If it was one thing I would have said the one thing instead of listing and explaining a few of the many important factors involved.

Inflation by the way is a monetary phenomenon. When money is created from nothing that is inflation. Whether or not monetary inflation results in higher prices depends on many, many other factors. For example, if monetary inflation is running 10%, but productivity is increasing 20%, then prices may fall even with 10% inflation. Exactly what has happened with a lot of electronics.  

Or if the newly printed from nothing money flows first into banks and Wall St then it will drive interest rates down and equity prices up. Any of this starting to sound familiar? 

We are now in the early stages of monetary hyperinflation, but hardly anyone notices because they were all Jedi mind-tricked into thinking inflation is rising prices.
By the time enough prices are rising fast enough to catch on to what I’m saying it will be too late.

Can anyone explain the sudden and significant increase in the desirability of a record like the MoFi release of Miles Davis Milestones, as an example. This release was available for years with seemingly little absorption, and yet we now see it selling for 3-4 times the original pricing! There are other good examples as well in both the MoFi catalog and AP, and I am not talking about the One Step releases, etc.