My in-laws have a neighbor who was trying to sell their recumbent bike in their community white elephant sale and they decided that it was too big of an item to sell that way.  It is an HP Velotechnik Scorpion FS 26 from 2013.  It appears to be in nearly new condition.  Brand new ones (non electric version) look to be $8k+ so I'm guessing a very lightly and good condition one can still be valuable to someone.  I don't know exactly where we would price it but some quick research looks like nice used ones are in the $3k range.