Hi,  I recently bought a piece of land in central IL.  The seller is a logger and went onto my property and cut down a bunch of big black walnut trees.  They are 20 inches in diameter and I am now trying to figure out how much he owes me for wrongfully cutting down trees on my property not his.  I know typically the law says the offender is to pay 3 x the value of the log.  How do I figure out the value of these logs?  Do I need to hire a professional and not take this loggers for his word?    
Thanks   Bob