The listed price does not equate to a hidden gem. It is lower than others because it could use a bit of upkeep (holes in ceiling, some clutter, not well insulated, so you can hear upstairs TV).
Regardless, Nafees is a gracious, honest host that all others could learn from. He doesn't paint an unrealistic expectation of his unit. Doesn't trick you into exaggerated cleaning fees. Doesn't slap ridiculous rules onto your stay.
They say you get what you pay for. In this case, you get a safe night's sleep and a host that is as honest as they come. And for many, that will be enough.