My question would be first what do you want your metal detector to do? Then do you look the ease of use with your 150? If you find the Garrett easy and fun, maybe stay with that company. A lot of local pawn shops have metal detectors in the back of the store! Many are just waiting for someone to come claim it! I found a Tesoro Compadre, the pawn shop was asking $150.00 and I got it for $50.00 it was a good machine sold it on ebay for $150 awhile back. If the Pawn shop has to go in the back or you have to dig for it like a lost $20.00 St. Gaudins they are ready to hear an offer! The 350 is around for what you want to spend used on ebay from time to time so are many of the higher end bounty hunters used.