Blue Skies, there has been at least one good, informative thread on this issue. You may be able to find it by doing a search here. The sum and substance of it was that those who degauss mostly think they can hear a difference. Those who use very expensive degaussers are happy. Others who use cheap ones are also happy. There was one post with very good instructions on how to use an inexpensive handheld degausser to good effect. You have to be careful, because those devices can magnetize as well as demagnetize. They only demag when used correctly. At least one of the expensive ones dedicated to LP use is programmed to avoid the undesired result. That's why you pay the big bucks. (Cannot recall the brand name.)
As for me, although I am a determined and aggressive foe of static electricity, I prefer not to enter the weird wild world of "magnetic" LPs.
As for me, although I am a determined and aggressive foe of static electricity, I prefer not to enter the weird wild world of "magnetic" LPs.