If you want some of the Green Frog Productions, check out Train Video Frog’s Store on e-bay (
http://stores.ebay.com/TRAIN-VIDEO-FROG). He sometimes sales videos for over half off, I’ve replaced all my old Green Frog Videos with DVDs from this source (order several at a time and save on S/H). Also check out e-bay’s section on Collectibles > Trasportation > Railroadiana, Trains for videos, you might find a bargain or two, but always know what you are buying (and don’t forget to look at the shipping changes before you bid).
Also look at what Russo said about Roger’s screen saver, it is well worth the price.
Phil