That's a nice van at a good price, for a decent mileage 7.3
Interior would look great with a cabinet hardware swap out and maybe black T-molding to give it a more modern look.
Grill and headlight swap (read cheap) would make the exterior look 10 years newer.
The seats in my 95 are much more supportive and comfortable than the newer seats IMO, which could be a good thing for someone if these aren't worn out. I've driven a LOT of newer Ford vans.
This Quigley appears to have the older style box control arms which are prone to cracking. They'll need inspection for sure.
At 150k behind a 7.3 the transmission might be about done. Maybe it's been rebuilt by now.
1994 is pre-OBDII. Not sure what that means on a diesel but for the gas models it means no plug and play tuners.
Unfortunately it doesn't look like the original owner opted for pop-out rear windows, which they could've gotten in this year. A huge plus on any 96 or older van.
Looks like the original propane/co2 detector, which will no doubt be gone at this point (they have a definite shelf life). About $50 to replace and I would do it ASAP.