OT: on approval

I am thinking about offering an "on approval" service for previous customers. Has anyone ever did this? How would set you up? if you were a customer Would you try it? I removed my website link because I didn't want you to think I was spamming; while I am seeking opions. If you prefer email me Any help appreciated.
My ebay store IS CLOSED TEMPORARILY
0
Comments
John
info on file with you, the process works well.
In the schemes I have seen, the seller pays the
postage/insurance going out, the non-buyer pays
the postage/insurance coming back.
In the age of scans and graded cards, approval
services are redundant for all but expensive-raw
cards.