Marvel Collector Corps Subscriber Exclusive Pop Available Now! Posted by Hello Subscription on December 22, 2017. Subscription Box News Make the first comment! Hello Subscription independently researches and reviews the best subscriptions and products. Things you buy through our links may earn us a commission. Save for LaterGo to commentsNotification Marvel Collector Corps has released another subscriber exclusive! Baby Groot with Mix Tape is $18 + shipping. Find it in My Account under “Member Exclusive Collectibles.” Must log in!