I sold at an eBay store for 3 years and did very well. Workplace time commitment and my supply dropped not keeping up with demands. I hope to have a store again in the future.
My store was Manic Mania Racing a National Hot Rod Association (NHRA) memorabilia store and other oddities too when deals arose offering a profit to be made. I offered authenticated autographed articles, i.e. Hero Cards, various die casts of race cars, and photo images. Plus, Collectibles gathered since the 70's and off line deals with treasure hunts and discoveries. It supplemented my income nicely. Handsomely profitable too . . . and fun, fun, fun . . . with a bonus of making many friends :)