If you are going to ebay, good accurate description and quality photographs go a long ways. Use a contrasting solid color background like a bath towel or bed sheet. Use a camera that takes good close up pictures (macro function). Look up how to take good pictures, there are many excellent how-to's out there.
The packaging, if complete or in good clean condition, is valuable to collectors. The engine is also valuable to collectors. Bills of sale can also be very interesting to collectors, particularly if handwritten and dated (be careful of personal information). Clean complete packaging with a clean complete engine and accessories may go very well, especially if you can get more than one collector interested.
Best of luck
Phil