value for commons is in having all the entrance music in the crates they're giving away to everyone who bought during the event. otherwise they aren't worth paying attention to unless they go beyond vanity and have utility.
there aren't any "roll mechanics" for legendary crates, whatever is in your crate is in YOUR crate, so if you have a chance to have multiple legendary managers that are worth $20 each or a gb legendary and you sell it for less than $60 the remorse will never go away. #WOOGAME