Price:

A link that was accessible from the external Internet: $10 per link resolved. Volume discounts available.
A link that was accessible internal only: $25 per link resolved. Volume discounts available.
 
A link is considered resolved when a replacement has been suggested and the suggestion has not been rejected.
If an invalid link appears many times (example: in a menu, or an include), for billing purposes it will only be counted once

Requirements:

We work with a number of different Broken Link Checker software.
The two most common are QIPoint for SharePoint sites, and Xenu for any site.

Requirements If you are running the broken link software

A copy of the output files from the run.
Any login/passwords necessary for read access to the site
E-Mail and phone of contact person, who can get answers to questions within 2 business days max.

Requirements If we are to run the Broken Link Checker software

Either: Access to the broken link software that has been set up and run.
Or: A list of sites to check, a list of sites/links not to check, and a username/password that has access to those sites. This setup is an extra cost item typically ranging from $200 to $1500 depending on the complexity.
Any login/passwords necessary for read access to the site
E-Mail and phone of contact person, who can get answers to questions within 2 business days max.

Requirements If we are to make the modifications.

Any login/passwords necessary for read/write access to the site
The pages/lists to be updated should be version enabled or provide read access to the daily backups
E-Mail and phone of contact person, who can get answers to questions within 2 business days max.