It's a personal service business, There may be some value in accumulated information not available from other sources (as a data base of commercial lease information, for example) but other than furniture, books (perhaps), a res guy doesn't have a lot to sell.
Perhaps a well established residential appraiser could be cajoled into sticking around to lend her name and gravitas to someone aspiring to not have to depend on the GSE-linked business (as someone with an established local, non-lender herd of clients). (Or maybe I'm hoping some bright-eyed, bushy-tailed, aggressive young appraiser would leave my name on the letterhead, prop me up in a corner, come by and wipe my chin from time to time, and put me on an allowance because of my decades of experience, and scores of contacts.