Sterling -- I've had an ebay acct set up for years. It's pretty easy, somewhat easier for me than consignment, since I dislike trying to guess what the consignment shop will be taking, what's in season, etc. Ebay is easier than ever using a smartphone to take pictures and uploading directly via the app.
I really ought to switch to Poshmark, though -- I think most of the action for clothes is on Poshmark and The Real Real now. Ebay can be a bit slow compared to years past. But setting up new accounts and learning a new interface isn't in the cards for me right now -- I just need to get rid of some stuff!