Steve,
Excellent advice. You would have been sick if they sold and you found that out later.
Everytime I watch Antiques Roadshow and they appraise some piece with an astronomical value, the owner usually always says, my wife bought it at a garage sale for $2. Well, not always but you get the picture.

After that I have been checking the Ebay prices myself. It is so easy to overlook something really valuable just because it's been collecting dust for years and who would think we had burried treasure in our homes.
DJ