How to Sell On eBay Without a Website

How To Sell On Ebay Artilleryman (?) armed with a M1879 Reichsrevolver, October 1917 Nothing on reverse, but a copy of this postcard was sold on ebay where the seller was kind enough to include the letter on the reverse of his copy. "France 22. Oktober 1917 Dear Brother, I hereby send you my best [...]