Welcome Nancy to strike collecting. There are several price guides available in various price ranges. The most inexpensive is probably Art Beckers guide and you can contact him at www.artbecker.com (his website) but it is not illustrated. Howdy's Illustrated guide to Nevada Silver strikes is a good one and I believe you can contact him at chipmaster@chipmaster.com. Also William Cohenour has a real good complilation guide and you can contact him at wcohenour@earthlink.com. There are more guides out there Andersons Colored Pictures of Strikes contact rbainlv@ipmail.att.net and Jim Turbows Compact book contact JimT@Jimbow.ipmail.att.net
Hope this helps.