I have friends who live in Chilliwack, and I am hearing the same stories about price trajectory.  

Back in 2015 the Chilliwack Times asked "Could Chilliwack become a safe haven for real estate refugees fleeing the supposed tyranny of high prices?"

I suspect that is what has happened. So yeah,  probably no offshore money in the market there, but the displacement from other areas where there is, is pushing price and demand. 

For anyone thinking of a move there, I would advise to buy too. Soon.