I have owned over the years: Yashica D, YashicaMat 124G, YashicaMat EM, Rolleicord Vb, Rolleicord IV, Ikoflex Favorit, Minolta Autocord L, Minolta Autocord CDS III, Ricoh Diacord, Ricohmatic 225, Rolleiflex 2.8e, Rolleiflex 3.5e, Rolleiflex 3.5f.
I have found that unless you are getting the Planar/Xenotar Rolleis, the Ricoh and Minolta are by far the best cameras. The Ricoh and Autocord lenses are far sharper and have more bite than any of the Yashinons, and also sharper than the Xenar's found in the Rolleicords. The Diacord/Ricohmatic/Autocord cameras also have the flat film plane, and have a nicely baffled (esp. the Ricohs) film chamber. They are also far better built than the Yashica cameras, and have a hotshoe.
I have seen Diacords go for as little as $30 on the auction site - I find them to be a much better camera than the equivalent Yashicas (which are overpriced as even Rolleicords go cheaper), and are about the best bargain to be found in a TLR. And the lever focus and controls are much more ergonomic.