On the Pentax theme I'd recommend you look out for a Centon K100 which is a Pentax clone and takes the PK fit lenses. Loads of fine quality Pentax SMC lenses available as already been said. They are well built, very cheap and on Ebay they usually only go for about £10-15 (GBP) leaving you free to spend your cash on lenses. Since I liberated one from my son I've used it more than my Nikon F100. Manual cameras are great fun to use and you'll learn everything you'll ever need with one.