Here are a few audio(?) products that are either close to irrelevant or not a good value/can be substituted at 90% or less the price.
1. McIntosh LB200 Light Box $1500. Not an audio product. 99% irrelevant. Useful for vanity purposes.
2. Furutech DeMaga LP demagnatizer $3300. Furutech's own Destat III at $300 does the same thing. So do $100 demag guns. Heard it, no difference than Destat III.
Hint: Brushing one's tonearm prior to play, one swipe, with an anti-static record brush can be effective for free and is quick.
3. DS Audio’s ES 001 Eccentricity Detection Stabilizer $6000 For the fastidious LP listener who will spend more time centering his LP than listening. It is not easy to use and the results can be beneficial, but at what cost to one's time?
4. Shun Mook LP Clamp $5600 Heard on a high end system (Wilson Audio Alexandria Xlf, McIntosh MC 1000s, DS Master 1 cartridge, etc.) Yes, all four of us heard a positive benefit from using this versus not using a clamp. Was it worth it? Not to any of us. The owner is a audio reviewer. Actually, the system was extremely resolving with fantastic bass and dynamics. But, it was fatiguing to listen to after an hour.
These are just a few examples where dubious value of high end products exists.
As to centering LPs, a turntable that was designed to do that were a Nakamichi TX 1000 from the 1980s as I recall. I heard it at Beverly Stereo back then. It sounded great. I could not afford it then.