Using eBay to build a mailing list

Is there a way to do this?

I just got an awesome hookup on a physical product (a type of shoe) that I can buy @ ~ 20% of retail price. I've only sold a few, but the average price so far has been ~40-50% of retail price. So I figure (after fees)

I'd like to take these buyers off ebay if I could (for the purposes of building a list AND avoiding the fees).

Any ideas on how to do this?
I just recently became active as a seller and I know that a lot has changed recently, so I can't really trust what I read on the internet because of it's age (therefore, no longer applicable).

You can't ask anything on ebay forums either because everyone there is a "goody-goody" whitest of whitehatter.

A good way to build a list with eBay is to post a classified ad with either a link to your site, or I've even seen people put the optin box right in the ad.

Andrew Lock is the master of that... not sure if he's on here or not.