I'm looking to purchase banner ads in PR3+ websites for $5 per month. Its for a web hosting related website.

Blogs and forums are preferred. We have the following Banner sizes:

(728 x 90 pixel)
(468 x 60 pixel)
(160 x 600 pixel)
(120 x 600 pixel)
(180 x 150 pixel)

PM me with your website URL if interested. Payment via paypal.