As someone who has parted a few Ks:
It's a lot of work and takes a lot of time - disassembliing, organizing, emailing, finding boxes, shipping, etc... You can get your money back but you have to earn it.
If you sell stuff on eBay and price it right then you can get rid of some parts in a week but it's a lot of work to set up all of the listings for the separate items and both eBay and PayPal take a chunk out of your hide for every item you sell.
Some parts will sell fairly quickly: fuel pump, fuel level sender, side covers, etc.. Others won't so you will end up with a fair amount of parts hanging around for a while.