Welcome! jakobian64
not to worry about the SH site, it is a joke, in very poor taste. Your customers will follow you to other sites. eBay, by and large, captures the global audience including me. There are high-end sellers still on that site. Equally, there are high-end collectors searching daily as well.
Based on your locale, you may consider an auction house for five-figure Records. As above, Record Shows/Swap meets are excellent as well.
The Austin Record Show enters my mind. Keep us posted on your situation. SH has made many enemies by operating his communist site.
Too bad, as it is a pretty good read for variations in recordings, pressings, production of music.