Well we sell basically 2 types of banners: 468x60 ads and 125*125 ads.
The 468*60 Ads give out awesome brand recognition. They are placed over the top banner. The developers that tend to go with these are looking to get a good return in the long run by creating great brand recognition. These ads cost $50 per month.
The 125*125 banners give out some brand recognition which is neither high profile or targeted, but they do give out great immediate referrals. They are placed on the bottom of the left menu. Considering their great value (their cost per impression), they probably offer the best model for immediate return, along with targeted Column Ads.
We sell text links as well which are placed on the footer of all pages.
Text Links: $15 for one month, $35 for 3 months or $120 for a year.
Banners (125*125): $30 for one month, $70 for 3 months or $240 for a year.
Banners (468*60): $50 for 1 month, $120 for 3 months or $400 for a year.
Please let me know if you're interested.