Post it here, just without making purchasers go through eBay.
You can post some photos of the product, specs, and the price, and how you plan to handle shipping, and people will usually contact you via PM here on APUG or e-mail, if you have your e-mail link in your profile, and you can handle the transactions via PM or e-mail, as is convenient.
You won't have to worry about eBay fees, but bear in mind that transactions that take place through the APUG classifieds are just private arrangements made between individuals, and if there are problems, APUG can't offer any protections like eBay or PayPal, but we'll often try to help sort things out where we can, in the rare cases where transactions don't work out properly.
Sellers are encouraged to make a small donation, on the order of 3%, if a sale goes well, but it's not required. In a case like this, with a low-cost item, you might chip in a few bucks every five sales or something like that, if you make that many.
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