I sell computers with initial bid set at $.01 and no reserve. Usually I start my sale on a weekend (Saturday or Sunday). I put "$.01" in the titles of my auctions, which seems to attract attention. I've never lost money selling complete systems on ebay. Usually I get a pretty decent profit (in one memorable case, $400 on a $500 computer).
Be VERY CLEAR about what you're providing. I had a guy spouting all kinds of crap at me because the machine I sold included Red Hat Linux with an option to install Windows. He read that as "A pirated copy of Windows is installed, for free, on request" and hilarity ensued.
If you're providing pictures (a good idea), do so either indicating that your picture is of the actual item, or (in LARGE PRINT) that you're using a generic image. I've had to deal with annoying issues from that, too.
Buyers seem to flake out a lot, particularly on more expensive stuff. Annoying but understandable.
Don't send anything until actual funds are in your actual bank account.
Don't take personal checks, ever.