I’ll let everyone in another secret, if one doesn’t know already. CDs don’t all sound alike, even though they could be from the same master digital copy. Especially from different pressing plants. I’ve been through sometimes six copies of a favorite CD and three or four will sound quite different, generally the dynamics and body of the sound. I use the same Furutech D-Stat III gun. Prior to that I used a Kilowat destat gun. I tried the Audiodesk audio lathe (trimmer) for a few months. Differences remain between stamped CDs. Tom Port pointed that out back then as well but he doesn’t care about CDs and we had a shoot out of some Capitol pop CD.
Most of my records were purchased used (maybe once played). Probably 8,000 were given to me free. Most were purchased between $1 and $5 from the 1960s. My $10 to $25 records are rarer stuff. My best friend only collected Jazz LPs from the 50’s to 70’s and his collection of 3,000 LPs has mostly $50 to $500 LPs. He stopped purchasing LPs for more than $35 a couple of years ago and purchases only CD reissues now. So do I.
Most of my LPs are worth under $2. About 1,000 are worth more than $50 each, up to $500 (mostly classical). My typical classical and opera LP is not worth much anymore (about 20,000 LPs worth). My pop and jazz LPs are worth more. My ethnic music LPs are worth $5 to $10 each generally with some titles exceedingly rare in mint condition-basically priceless to me (100 to 500 pressed per title in the 50s and 60s) with few collectors for them.
I just don’t purchase LPs for high amounts despite being capable of doing so. The music I listen to often is rare and unavailable and the reissued LPs often don’t sound as good on more common pressings. I find that MOST high value LPs may have the distinction of being a first stamper, early pressing, or other attribute but the variability is sufficiently great that the particular LP being sold may not be a "hot stamper" quality. At least at Better Records, he listens to them and informs on what he hears. It is a crapshoot to purchase used older LPs otherwise for high prices. Of course, they could also be just bad reissued LPs like the MOFI Respighi.