Buying comfortable shoes on ebay requires some up-front research into the most comfortable brands and styles of shoes.
There are several manufacturers who specialize in the manufacture of comfortable shoes: New Balance, Merrell, Mephisto, Ecco, Born, Naot, Finn Comfort, Dansko, Birkenstock, Dr Marten's. All of these brands make comfortable shoes in several styles - walking shoes, dress shoes and work shoes.

When you buy comfortable shoes brands on Ebay you should be going for a substantial discount on retail price. There are now many stores online which offer great pricing like Zappos, ShoeBuy or MostComfortableShoes.com. These stores also offer free shipping. So to get a bargain on Ebay you might want to compare prices at the above stores to ensure you are indeed getting a bargain.

After you visit these stores and determine the exact style or brand of comfortable shoes you are looking for, do a search on Ebay and see if you can find that same item for sale.

Good luck hunting for comfortable shoes!