So the Ebay listing stated it was a rare Marx set. I had never heard of it before. The premise of the set was pretty cool - military guys fighting dinosaurs.
I bought the set. It has a nice Marx logo on it but this is definitely some type of bootleg, or repro set - Made in Mexico.
No worries though - everything was in pristine shape. The set and its accessories are pretty cool. I wouldn't say this was the end all- be all Marx set, but the idea was cool. A good addition to the collection - even if it is a bootleg.