Ask this question on the Trees forum.

Here is a link that might be useful: Tree forum

I will - thank you very much for letting me know!

Insurance companies might have standardized values for these sorts of things. Just a thought.

There is an estimate of value system for trees like this, it includes a point scale for aesthetics, species, age, size, shade, location... the points are added up and a value is determined. These estimates to be valid for insurance purposes need to be prepared by a licensed arborist. Check your yellow pages... another place to check is the local park district for a reference.

If it hasn't already been chipped & trucked off, look into the woodworkers community -- if it has interesting grain it will be valuable as wood! Sometimes very valuable.