I also recommend the KX; bought mine new in 1977. In the UK they are still holding their prices quite well but here the market for older autofocus Pentax SLR's seems to have nosedived. A few days ago I was able to purchase from a dealer an excellent Z-50P (PZ-50P in US) body for just £49 which is less than half of what a KX would cost. And this is only 10 years old while the KX cameras are now around 25 years old. Unlike the K1000 they didn't stay in production of a very long period. So if you can pick up a Z/PZ series body at a low price it might be worth considering as it can be switched to manual and unlike some of the later MZ/ZX series it is compatible with the earlier bayonet lenses.