Well welcome anyway from an old guy. Stay away from eBay, and either go to the Classifieds here, to Larry at Whipped Dog or to SRD and bite the bullet on a $100 quality razor. The key is to get a shave ready razor which all three of those sources reliably have, and a strop...same true of those three sources, although Larry is likely the cheapest of the three.

Starting with a known, well prepped razor is the key to success. Won't get that on eBay.

Enjoy!