Tie Dye 2020 by deadmau5 typically asks about $45 on Music Merch Marketplace (M³), based on live listings from eBay, Discogs, and official stores. That is about in line with the typical apparel on M³ at $46. Condition, size, and signatures can move a single copy's value.
Music Merch Marketplace (M³) doesn't have enough live listings over time yet to say whether Tie Dye 2020 is going up or down in price.