I don't know where you live, but in some cases, just sell them for "local pickup." It'll take a bit longer to sell, but those living close enough will eventually scout it and can buy it online -- to pick up in person. This also adds value to the customer in that they can come see and test the product before leaving, so you have peace of mind that they received it in working order and that they were happy. If you have to ship stuff, I'd recommend breaking things down into manageable parts. I sell tons of things that are stripped parts off of larger items to make it practical for me. This often nets more profit than the entire larger item itself as well.
FedEx Ground is also not too bad for shipping larger items. USPS Media Mail for books is cheap. FedEx freight shipping is ok too. Without knowing what you have in mind, or your details, it's hard to go deeper.