Where to sell used high-end fountain pens?

By coincidence I was just thinking of setting up such a subdomain of www.vintagepen.com because there is no place to sell such items. That site was one of the first on the internet back in the mid 1990s!

The problem is that there really is no software "off the shelf" to do this and in the past, while there was no software, some of the biggest pen experts in the US tried it with sites such as www.penbid.com and it didn't really take off. Especially where there was competition from not-really-an-auction-site ebay.