How much i can sell this link?

Hi friends,

My primary business is building backlinks to webmasters. While searching for D O F O L L O W websites. I found 1 website D O F O L L O W with page rank 8, where we can place our link.

How much i can price this link?

Please advice me in this as i found some page rank 5 and 4 links too with D O F O L L O W .

Thanks in advance.

No i mean here not selling to them, as i am in the link building business. I will place their link there for charging some fee. I am asking how much i can charge them for placing their link there?