Strange post Nino,
But otherwise interesting.
Flyers are allot like pins, in regards to pricing, prices can fluctuate from dealer to dealer. They still can be found for cheap if you're constantly on the look out like a hawk.
I collect SS and DMD flyers only. Most expensive flyer i paid for was of course KISS..... $50 US....and that was when they were selling for up to $150 US.
Now they are getting harder and harder to locate especially the SS flyers from the late 70's to early 80's.