Since reading your post this morning, I have had a look at prices for stuff on the CAG site versus GoG -- specifically prices for art related to the Exidy 440 series of games (Cheyenne, Crossbow, Chiller, etc.).
WOW!
GoG is less than half the price in many instances.
Also interesting to note that some of the artwork on CAG is tagged as "ClassicArcadeGrafix.com Exclusive", even though GoG has the same art (as do those who were part of the BYOAC group buy of the CAG library).
If I decide to go with "standard" artwork on my Exidy 440 Multi cab, I'll be going to Scott (and he was featured in that
recent arcade book - not mine, but is a good book and Scott is featured in a blurb as one of the MVPs of the Arcades).