Properties that are available as 'contract for deed' will often show up that way on MLS. And there are very few Contract For Deed listings on MLS at any given time.
NMLS # 6395
Financing Kentucky One Home at a Time
Don't just jump to conclusions that it is the realtor's fault. How do you even know the seller has this home owned free & clear to carry back financing or even wants to? Why not just walk up to the front door and ask him yourself?
I would think that should get you a more prudent answer than chatting on Trulia.