For two days only.
In celebration of Dinosaur Day, Upper Deck e-Pack are offering a "buy 1, get 1 free" sale for their 2015 Upper Deck Dinosaurs trading card series until May 17, 2018 at 11:59pm (PST). Here's a list of the original prices for that product:
1 pack: $2.99.
1 box: $56.99.
1 case: $1,019.99.
Tip: You can find a load of cards from that series for sale on COMC.