NEW YORK — Halloween ranks among the biggest holidays in the vintage collectibles market, second only to Christmas. Halloween-themed offerings range from the whimsical to the downright scary. Movie monster figures, dolls and build-your-own-creature model kits have long been popular with Halloween-focused collectors. The material has evolved from toys built by and played with by children to purpose-made holiday keepsakes that can bring hundreds and sometimes thousands of dollars at auction.