If you are a Costco member or know someone that is they have one on the website for $149.99 delivered to your house!
What about places like Red Cross? I know up here they have a medical lending cupboard that people can sign out equipment to use.
Do you have a store that sells wheelchairs? Often they will have used equipment. They will often help get the best price if you tell them your budget.
Hope that helps you out some,
Rhonda from Canada