If you're just looking to clear out some stuff, I probably wouldn't bother setting up an ebay store. If it's going to be an ongoing thing, then a storefront might be worth it. I haven't had an ebay store in awhile, but I believe the basic store was a $14.95 fee, and then the listing fees/fvf were less.
Plus a store gives you the option to list something for a month at a time, ongoing.