Not a scam Pamela. We find a lot of good stuff with our detectors. I use a dfx on land A slight upgrade from yours. My hunting pal uses his xlt. He was complaining about to many mixed and broken signals on a coin program. He read his manual a couple times and still did'nt get it. It took me less then 2 minutes to clear up his problem. Your machine, one of the best, is set up to break up on undesireable metal objects, like pull tabs and aluminum bottle caps. Once you see through those signals and focus on solid repeatable tones you will be into it. Some questionable tones may be because of the depth of the target. check the depth, if it's down there dig it up. On the other side of the coin if it is too good to be true it usually is. A pop or beer can will give a steady unrelenting 72ish vdi Again check the depth if it says 1/2 or 0 lift the coil up from the target. If it still gives that nice crisp signal 10 inches off the ground you have 2 choices. Move on or dig it up and throw it in the trash. Not unusual for even an experienced "MDer" to not understand every detector.
You need to have someone with you to show you hands on and explain why. My guess is you are uncertain what to dig. Here's a tip, dig it all for a while until you get the hang of it. there are a lot of detectors hanging on a wall or stuck in a closet for the same reason. The user did'nt take the time to learn or ask for help. This hobby is full of people who are willing to show you how that detector works. Below are some of my pics, each representing a days find...Look for a club in your area...they are on line. phone contacts and addresses will be shown. Don't be bashful, you will be welcome.