No returns? Read ebay's buyer protection program. Buyers can and will return items, whether you accept them or not.

One challenge with trying to ship on one day is that buyers do not all pay immediately. So I end all auctions Sunday night. A couple will pay immediately, and get shipped Monday. Another might pay Monday, I'll ship that one Monday or Tuesday. Then another buyer doesn't pay til Wednesday, so I need to ship by Thursday. And the last buyer doesn't pay, I file a deadbeat report, about half of them eventually pay, the other half, no pays. That takes you to the next Sunday, where the process repeats itself.

Whiny buyers can drive a Mack truck through "the item not as described" rule. I sold a pair of gray shoes, with full sized hosted pictures. Buyer said the shoes were olive gray, instead of silver gray (WTF?). Of course, I never said they were silver gray. Didn't matter.

Despite the work and issues of selling on ebay, it is the place where you have the best chance to get full market value out of your items.