I have purchased a minelab 505 from Kellyco that is to be delievered next thursday. For days I have been reading this and other forums and now wonder if I should have purchased the 707 instead. I am retired and spend the summers on the coast of Washington state. Lots of ocean beach to cover. I spend the winters in Arizona. Lots of mines and desert to cover. I have a neighbor here in Arizona that has 2 md's and he loaned me one and took me to a local park. We found some coins but nothing to talk about. But I think I'm hooked. I believe I can call Kellyco and tell this story and they will let me refuse the fedex shipment and order the 707 instead. Being a total newbe, a little input would be greatly appreciated. Thanks