Recently adquired PR7 Site , backlink sale question

Hi guys, i recently adquired ccTLD domain PR7 , 12 years old , educational type,
i wanted to sell 10 high pr backlinks (limited amount, to make it more exclusive and relevant), at what price can i sell this or which service will pay the most out?

Thanks

check "text link ads" or DP link sales section,you should be able to make some good money