One thought is that the owners are seeing what's coming in CA - or has already hit them in the form of higher taxes and fees on anything that move, plus bhuildings, land, etc. Or they are just trying to get theirs - like Pegleg's example, where once the business was thriving they jacked the rents up. Or maybe they are just obviously clueless, like the folks here who own a building that is for sale, the only tenant closed up. I called looking to rent part of the space - no return call.
Tough news TAB, hope you can find a new, cheaper place soon.