Thank you for your time guys, as always you are awesome!
somesuch, I'm looking pretty much everywhere on the internet, buying abroad is definitely a possibility... But the US are really too far away for it to make sense... Here in Europe these bikes are rarer than in the US and a lot more expensive!
That modified 71 looks amazing anyway!

I'm sure I could live with the (lack of) power, but not with a botched bike.
The owner bought the bike from the original owner, had it serviced and the carbs rebuilt because it sat for quite some time.
I can't figure out why the flaking paint and the stripped screws, why should you open a 25000 miles engine?
Time for some pictures. I'm not a good photograph, and my stupid mobile phone is stupid. So please excuse us.

Engine paint flaking (and some stripped screws!)

More paint flaking and Engine serial number

Some small paint defects

Yellowish stain on the top fins of the cylinders, some more paint flaking and almost-stripped screws

Small rust points on the rim...

Handlebar, controls and gauges. (And some horse manure.)

Exhausts.

The fresh side covers!

I hope you can see the pictures! If not, please tell!
What do you guys think of the bike?