Keep an eye on Rolleicords, I have had 3 all between $25-$125, usually with some filters an hoods thrown in. Currently, I am using a III and a V, lenses are the same as the 1950's flex's and I think the ergonomics are better, particularly with a flash bracket. Other good Japanese TLR's are the Yashicas (D, EM, LM, Mat, 12, 24, 124, 124G) are the best models and can consistently be found for under $100. Additionally, Minolta made the Autocords that are well respected but typically over $100.