I am selling text link ads on Software and related sites with PR0-PR4.
The price for link placement starts from $1.60/month.

There are discounts for long term deals:
3 months = 5%
6 months = 10%
12 months = 20%

Besides, we have special discount offers for regular clients depending on the *quarterly* volume of orders:

$5,000 = 10%
$10,000 = 20%
$20,000 = 30%

The main details of the offer:
*total number of OBLs will not exceed 12/home page and 6/sub page
* around 2,700 sites in different categories
* all sites in one subcategory have different C-class IPs
* only relevant links
* in-content or sidebar placement
* original, custom-edited content
* direct do-follow links hard coded into the html
* special discounts for SEO clients

If you are interested in purchasing links on quality sites, please PM me back, I will be glad to cooperate.