How to find websites with real pr6-7 to buy links?

Hi,
I need to find relevant websites with high and real PR (6-7+) where I can buy links but look like that is not easy or owner want from me to pay for link more than he earning with all ads on website (cpm/cpc based), one website owner want from me 350EUR/month for footer link on pr4 website or one other want from me over $1 000 000 for old domain with maybe 100 visitors per day and low pr and I must say that it is not some premium domain like buy.com or sex.com, that is domain with two words,…
How to find websites with real pr6-7 to buy links?

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