Buying unsearched Raw Lincoln's

I have an oppurtunity to buy a small collection of raw semi-unsearched Lincoln cents from 1909 to around 1980. They are mostly before the 1960's though. There are about 30 rolls in all with many in rolls and some in individual manilla paper flips. I say semi-searched becuase they are from an old collector who pulled pennies from circulation to add to his set, but he died in the early 80's and his heir is in her 60's and knows nothing of coins. I know there is not a 1909 s vdb because he only found one and I have it now. There is probably not another 1922 plain cause its mine too
But since he was pulling to fill his dansco album that does not have any varieties then theres a good chance that these can be found. But I am not going to search through all of the cents looking just to make an offer. This collector seems to have also pulled pennies that he deemed would be more valuable like early cents. The problem I have is how much to pay her for these coins. I don't want to search them all just to make an offer yet I don't want to pay stupid money, not undercut te price so much. Just want to pay her fair market for them. Of course I am also going to buy what silver coins she has also, such as a few early halves and quarter dollars. But those are easier to price and give fair value for. Any help would be greatly appeciated.

"One of the advantages of being disorderly is that one is constantly making new discoveries" -A.A. Milne
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Comments
you might find some RPDs or other minor varieties however
www.brunkauctions.com
JP
Capped Bust Half Dollars by Variety & Die State Pictorial Refrence
some here have had great luck too
but most are falsely claimed to be unsearched