pump issues

I have a 40/60 pump in my well that is 5 years old and recently the pressure
has turned into a trickle. We always have water it just has no pressure what so ever. I need some suggestions we have sold our house and I would hate to cheat the new homeowners.

Low Pressure on Newer Pump

But everything else seems to be normal? Call the plumber.
Sometimes the EPA, DNR, Corp of Engineers insist on a anti siphon nipple to inhibit well contamination. Without being there or more input, I am not knowing.