Are you buying from a reputable seller/dealer? About the only thing that could be wrong with it would be an air leak, and they can be fixed by sending the gun off to a dealer to get repaired. It’s not something you’d want to try on your own without the proper training. I own a Daystate, and I’ve had it for three years now. It has functioned flawlessly since the day I got it. I did a lot of research on all brands of PCP guns before selecting my Daystate Huntsman with the match target barrel. Shooting it across my chronograph it shows amazing shot-to-shot repeatability in FPS, and after trying fifty different pellets through it I’ve found that JSB’s and AirArms 18g pellets are the most accurate. The gun will shoot in the .2’s five shot groups at fifty yards on a calm day. It easily shoots as well as my Anschutz, T-Bold, and CZ rimfires at that distance. I can tell you that you’re going to have to get a pump in order to shoot it. There’s no other way to fill the gun’s reservoir other than using a pump, compressor, or SCBD tank. The pump is the cheapest way to fill it. Not the quickest, or the easiest, but the cheapest. In spite of my age (in my 70’s) I can pump the reservoir in about three minutes of vigorous pumping and not kill myself in the process. However, I like to shoot more than I like to pump so I bought a SCBD bottle. It costs me about twelve bucks to get the bottle refilled after several thousand rounds of shooting….a pretty good deal. Can you share what model you’re getting and where you got it? I may be able to give you some more insight.