I too have bought a lot of flyers from "pinballjoe" on ebay over the years and never had a problem with the quality or doubted anything otherwise. He has not been my sole supplier as I have bought some from the States and europe as well as swapping some with other collectors.  I've currently got just over 300 with about 40ish of them as doubles(My fave is a Fathom flyer personally rsigned by Greg Feres that a mate got for me at last years chicago). I have them in plastic sleeves so I can see both sides for ready reference stored in binders with a different binder for a different manufacturer - all in production order. As far as displaying goes a mate of mine has a Bally corvette pin so he bought 2 flyers and framed and mounted them side by side under glass. Not happy with that he bought the fullsized corvette poster and had that framed which sits behind his bar - looks great. A lot of the movie themed games such as T2 & IJ also have small posters released by the movie companies that made the original film and while not having the pin in them they provide the tie-in. I did that with my CFTBL & TAF. Just a thought outside the square which gives a great arcadey look.