I think as far as bang for buck goes - the two you listed are great value.

I regret selling my LAH and my missus loved it.  I think I will definately look for another one day.  JP - I guess if you have kids (or grand kids!) then a JP would be awesome.  Both are similar in game play - although LAH has the 3 magnets in the middle which are just crazy (not sure about JP).

Most D.E's have issues with burnt G.I connectors and fuse holders on the PCB.  Both Rob you would be capable of fixing and nothing to worry about.  I found my LAH well build - the ramps are solid and playfields are good.  Plastics seem to be generally OK on the ones I've owned (Simpsons and LAH).  Overall they are easy machines to fix (ie no harder than any other).

If you are looking at a LAH - check on the movie ticket as most have wear there and also for planking or magnet burn in centre of PF.  If movie ticket is in good shape then you're looking good.

You should be able to pick up a project LAH for under $2K privately - dealer not sure.  I guess it depends on when it was purchased vs dollar.
JP - not sure.  Being more popular may fetch higher coin.  I saw one in near mint condition last week but I don't think it was for sale!