For Vancouver, go to http://portland.craigslist.org/clk/
If you qualify, buying is definitely cheaper than renting for comparable housing. Check your options with a mortgage lender.
I think your best site is going to be Craigslist Here is a link. I don't know what your looking for exactly but that is not much money if you need more than 1000 sqft. Have you thought about getting pre-approved for a mortgage? Maybe you can afford more and buy something and keep your money in the long run instead of renting. Ill attach my website as well if you have questions.