n.
25A0; a pretty penny (informal) A LOT OF MONEY, millions, billions, a king's ransom; informal a (small) fortune, lots/pots/heaps of money, a mint, a killing, a bundle, a packet, a tidy sum, big money, telephone numbers, an arm and a leg; Brit. informal a bomb, loadsamoney; N. Amer. informal big bucks; Austral. informal big bickies, motser, motza.
25A0; two/ten a penny (informal) NUMEROUS, abundant, thick on the ground, plentiful; in large numbers, by the yard; very common, ubiquitous; N. Amer. informal a dime a dozen.