My thoughts are similar. I've got all of them that had no contents and no closures, two thirds of them, soaking in a water/bleach bath. The others I'll clean one by one as needed, taking care regarding their corks or caps.I'd clean them all to get the loose dirt off them, then post them on eBay. You won't rich, but you will likely sell snough of them at those prices to more than recoup your $3 investment.
As for eBay, I'll pass there. When we sell on eBay we lose about thirteen percent between eBay and PayPal fees. We will put the better bottles in one of our antique mall cases, and the rest will come with us to the flea market for the tables.