There are different ways to find out how much you can competitively ask for rent for your condo.
1) Employ the services of a local agent that has experience in renting and listing properties in your area. This agent will be able to determine fair market value for your condo and they will also be able to market the unit to an abundance of qualified tenants, this will give you the advantage when choosing the right tenant.
2) You can also look at rental ads in your local paper, your local real estate magazines and also craigslist.org to investigate what other landlords are asking for comparable units.
I hope this helps.
KELLER WILLIAMS HOLLYWOOD HILLS