Having put a hefty discount on 76021 The Milano Spaceship Rescue a while back, Amazon is now finally putting the other two Guardians of the Galaxy set on sale. 76020 The Only Set With Groot Knowhere Escape Mission is $29.46, a 26% discount off of $39.99 MSRP. And if you thought that was a respectable sale price, 76019 Starblaster Showdown is a whopping 37% off of $19.99 MSRP, at just $12.37! There is a quantity limit of 2 each per order.