So it sounds like your dealing with a bedrock well as opposed to the cased wells we deal with out here in Western Oregon. I agree with the idea of hydro-jetting your current well prior to more expensive alternatives ($2800 is cheap to remove your pump/ column pipe and perform jetting). Although we would typically perform a downhole videography of the well to assess issues prior to offering a service. It sounds like he has performed an in situ drawdown test on your well and observed recovery to static was slow (generally is as you reach close to static water level) We generally tell clients wells do not go bad over time unless you are dealing with a sensitive aquifer and something has drastically changed (drought, someone drills a new well adjacent to yours, etc.) you apparently have 380' of water column to work with- that is positive. I would venture to guess a good cleaning/ jetting/ frac or whatever he's calling it will go a long way with production as you are probably dealing with silted in fractures in the bedrock reducing flow. Your well was likely drilled with air rotary DTHH methods which promotes the fracturing of the water producing fissures in the rock- the servicing they are proposing will likely get you back to original production or close to it. And please, replace the pump, motor, pump wire, check valve, pressure switch, etc. while they have your pump pulled- it's the cheapest time to do it. Do not let them sell you a used pump and or motor- go new from a reputable manufacturer- Goulds, Franklin, Pentair, Flint & Walling, Grundfos, etc. It will be less painful down the road. When I do stuff for family and friends, only new stuff goes back down the hole. Feel free to PM me if you have any questions