A gearwrench ratcheting wrench set caught my eye the other day, 20pc set for $40 and it includes:
SAE sizes: 1/4, 5/16, 11/32, 3/8, 7/16, 1/2, 9/16, 5/8, 11/16, and 3/4 in.
Metric sizes: 6, 8, 10, 12, 13, 14, 15, 16, 17, and 18 mm
Their 16pc metric set for $80 includes 8, 9, 10, 11, 12, 13, 14...