I have made two purchases where the seller said they were condition 9 out of 10, when the items arrived, the tape on the factory sealed carton had not been breached!
I think the site attracts some people who enjoy trying out equipment and maybe have connections to obtain it at significant discounts from "retail", don't lose much in turning the items over.
I am not a Raidho "expert" by any means, but have auditioned a few of their floor standing models, not my "cup of tea", but excellent speakers.