I think it is a combination of factors.
1. RentalStarter is based in USD (Real bricks and mortar and rents from tenants). The recent drop in $ per BTC has made it look cheap (Asset value after liabilities is about $700k).
2. Has been trading for over 2 years now
3. Steady returns in $ terms. Last year returned about $0.12/share. Expected to increase significantly over the next year. Don't forget the capital assets.
4. Regular and good communications from Brandon who runs the business.
If you want more details then contact Brandon, by email or on #rentalstarter on freenode and request an invite to the online web channel.
Andy
Full disclosure: I hold a substantial number of shares in RENT and have been increasing my holding over the last few months.
Hmm well I agree that all of those factors would explain upward pressure on the price, but the price jumped around 65% in two days (Jan 7-9) after seeing no significant movement for several months. The only announcement I saw around then was on the 10th, which was for underwhelming dividends. I may just be naive, but isn't that a little out of the ordinary?