PR 10 Link for Sale: The Current Value of Links by PR

I don’t really buy or sell links but I am always following the value of such links on the net.
Obviously a lot determines the value of a link with the major determining factors being Pagerank and age.
A page rank of 8 in a completely different category may have less juice for you than a PR7 with a perfect match. If they are given to you, I really wouldn’t worry about it but if you are paying good money you want to get the most bang for your buck. After scouring through many different ads, sites, and message boards I thought I would share with you what I feel are the going rates for links of different page ranks.  

Price is Per MONTH
PR10 Rare, see a few advertised but most are not legit. $500-$1000
PR9 Don’t see them often $400-$700 dollars
PR8 $150-$200
PR7 $60-$100
PR6 $25-$50
PR5 $10
PR4 $7
PR3 $4
PR2 $2
PR1 No Value