Bondage paid placement with great results
 

You can see here:
http://www.bdsmclicks.com/

Gallery spots are profitable.
Bondage, Torture, Maledom, Femdom categories
$75 2nd spot
$40 4th spot
Spanking, Latex, BDSM Video categories
$60 2nd spot
$35 4th spot
Other categories
$50 2nd spot
$30 4th spot

Great top list traffic available
http://www.bdsmorgies.net/
http://www.fetishsexpics.net/handcuffed_top/
here's the pricing:
$250, $125 and $50 for 1st, 10th and 25th
position.
In your spot you can put a
475 X 75 or around that size, "standard banner sizing" linking to your sites.