OP, have you tried any yet? Any leading options so far?
(Bikes, not binoculars)
I will likely take a look this weekend, but some other issues in my life are currently taking precedence (and I may be going on a trip a week from now).
You might not be able to take advantage of this, but I hope to shortly: If you live near a large-enough university (like a state university with 30,000+ students), and if this place has a surplus store, it might well be that at the end of the academic year, the groundskeepers go around and remove bikes left there by departing students.
We have this situation exactly at my university, and many students from abroad will even leave their cars in the student lot – a whole other interesting case.
Anyway, there will be a sudden flood of used bicycles available for sale soon, and it may be possible to get a deal there. Without having to resort to a used bike shop (still expensive) or craigslist.
Oh, and FWIW, I hope to see a few e-bikes, as these look like a lot of fun and would get me outdoors and exercising instead of being cooped-up all summer.