I do know that these Pulse Rifle Data Cards (and the Pulse Rifle Manual) that Derrick offered were pretty limited -- both in numbers produced and in timeframe which they were available. That said, I
have seen originals pop up on eBay from time to time. Not very often, but they do. I don't know what original data cards go for, but Derrick's manuals usually go for between $50.00 and $100.00 USD.
Although I do not have one of Derrick's data cards, I believe they were printed on a beige cardstock (not glossy), and not white paper. What I do notice from the auction photos is that the colors look darker, very much like color photocopies would -- but that could just be the way he photographed them.
Here are images of the data card which I believe were originally posted by Derrick over 10 years ago...

Now then, regarding this particular auction/seller...
I do find it a little hard to believe that he has 3 or more ORIGINAL data cards available for sale -- even though he states in the auction "ONE ONLY!!!". Also, when you look at the seller's feedback, ALL of his items are PRIVATE. This is usually a clue that a seller is dealing in goods that are possibly 'controversial', or are causing a stir for them. It also does not bode well for them that they are using some of Matt's (Matsuo) photos to sell their goods. I also couldn't help notice that they seem to be selling a number of SD Studios Lawgiver kits as built-ups. Now I'm
not saying these are recasts, however according to Steve (SD), the original molds are burned out and he is no longer offering his Lawgiver kit. So unless this seller did a bulk purchase with Steve, I don't know where he's getting his castings from.
Oh yeah... and that Halo SMG is also Matt's.
Hmmm...