"Disneykin play characters are here!" This advertisement ran in comic books in 1972. Two separate 16-piece sets were being offered for $2.98 each. Or if you bought all 32 for $5.98, they'd throw in two free bonus figures. Snow White and all of the dwarfs are pictured in Set B. Postage and handling was just 25¢/order. There's no mention of Marx. Instead, these sets were being offered by Gandalf Products Co. of NYC, a novelty warehouse retailer.
Ad measures approximately 6" x 9". Image via kenyatabks.
An ad from a 1974 comic book. Note the figures are now pictured in illustrations rather than actual photos. Plus the shipping charge rose to 50¢.
Image via animation proclamation.
Another from 1974, found in Tarzan #229, DC Comics. The warehouse seller is now listed as Saddle Valley Sales, Inc of NJ.
Image scan via The Warrior's Comic Book Den.