Expect those prices on auction and comission sales. Best is personal contacts and making friends. Browse your local and regional club rosters, visit swapmeets and museums, call people, make contacts. A lot of bikes lie dormant in garages and in museums!

You still got the phone. Peg bike collectors and 101 owners on a map and call them, they love to chat about their hobby and sometimes know about other owners and one thing lead to another...

Not at $20K.  I was in the same position as you last year.  The great news is that Carl is correct.  101ers (most) are extremely helpful. They'll tell you like it is. 

So, my experience has been that the bikes have skyrocketed.  No "unknown" barn finds.  With "Pickers" and all of the tv shows, people know what they have.  I've checked around the world...Belgium, Netherlands, Australia (with a great exchange aud-usd) and you're looking at 27-30 for a semi-complete runner.  Parts, if wrong or incorrect are usually available but very expensive.  Guys are now parting out 101's ao "101's"-not everyone is a true 101 for more than the bike. 

I used to restore Porsche speedsters, and the 356 registry was very similar to the 101 org.  The same thing happened with those little cars and the prices exploded! So my recommendation is to grab a piece of rideable art history before the mega wealthy drive 'em up more.

Good news is that I saw Mike at Kiwi Indian has a '29 101 driver at $27K where the owner passed.

Best of luck to you

Scott

I ran across a '28 600 101 in the UK for 10K pounds which is about $13500 US. A basket case but almost all there and fully assembled. It sat for a couple of months in the classifieds but i was able to contact the owner before it was sold.  I'm not even done with mine but the more i learn the more i want to restore. So if i see a '29 750 101 I'll let you know!