It technically is because it sells sex toys be they new or used therefore because of that we can’t mention it. @WillC or @Iwill mentioned it two weeks back to you but it got taken down for that reason. It’s has a UK site and because it’s kink site it’s slightly kinkier than what’s allowed.
I fell on my sword for you and joined fetlife (honest it all in the name of Kinky Fuckery Science) this week to see what the process is and have now seen how you can now do this undergarment selling. It’s relatively easy if you follow the guidance of the threads you join.