I`we had my hands on many mixte`s but gave most of them away, they are all a bit small. Got one now, a Motobeance that is just about big enough. Not on the road yet, I am remowing the road bars and putting Albatross bars for a more upright position.
Had two "almost mixte MTB`s" on my hands- single toptubes, but almost right. Strong frames, seat tube is not going to bend as is happening with alot of "steptrough" frames, but I found them too heavy.
Trying to make my "older bikefriend" to ride a mixte i brought to him last autumn. He is not riding bikes any more, but he still talks about doing it. I hope a mixte frame can make him ride for some more yrs. A lot of older men ride "steptrough frames" in this area. Why not?
I teach my son that a real man is one that can sit down when peeing and ride a mixte. Why let others judge you? He had some bad incidents with mens bikes when stopping on a red light. He call them "nutcrackers". He rides a sloping toptube MTB or a mixte or similar bike when 700 wheels is preferred.
This is a link to the site of our local bikeguru, some typical older bikes for the area.
http://www.denrustneeike.no/samling.asp
And this is some bikes for sale, especially the red "steptrough" ones is typical.
http://www.denrustneeike.no/brukte_sykler.asp
