Wiktionary
snap up
vb. (context transitive English) To buy quickly, usually because the item is a bargain or in short supply or something one has been searching for.
WordNet
Usage examples of "snap up".
There are some major battles going on right now to snap up what is left of the Empress' domain and Fiddleback's holdings.
The snogglehound was just about to snap up the sausage when Jorlan spoke.
Something in the younger mage's tone made Tabarast's head snap up.
Had an old wound reopened as it strained to snap up the toadstool?
Now a number of panels of thick armor hinged to the floor snap up, hedging me in.
Dark Soul face is knocked side to side with every punch for a minute, before its flesh torn hands snap up.