I have a caddy maxi and it really is a superb vehicle. Parts, servicing and fuel costs are negligible and it has tons of space.
They're not the most refined vehicle, but every time I think of upgrading to an SUV, the practicality wins me over again.
Your are right though, they're very difficult to find with low mileage and not abused. Prices have also gone up a lot. Mine is now worth a fair deal more than I paid for it 4 years ago.
Good luck with your search