Craigslist alternatives?

[Bob Cizmarik]

Hello BP community!

I am currently marketing my first rental property to prospective tenants. So far I've placed an ad in Craigslist's "for rent" section. I just posted this ad today and already I've gotten a few inquiries, however, thus far none the inquiries were strong prospects.  I'm thinking Craigslist just doesn't attract the best quality prospects. 

What are some other inexpensive marketing avenues that have yielded success for others?

I'd be very interested in hearing your thoughts!

-Bob