Honestly, use eBay as an option. Put your stuff up there, but first read some information on how to sell your product. It isn't easy selling stuff on there. They have all sorts of great information to help you out though, just have some patience. Selling this big of a product isn't a small thing.
While you have your product up on eBay, put up listings across your neighborhood advertising your stuff. Use a cell phone number as your contact on the listings if you can. Then, try the option of a garage sale. If you happen to sell your product outside of eBay, you can always close your auction. Be aware if you don't know this yet though that eBay takes percentages of your sale and charges you to put up more then one photo. There are also other charges, but you'd make great money anyway.