Knight (Black Falcon) - Black Legs, Black Hips, Rounded Shield, Neck-Protector, 3626b

Comes in 2 sets, made of 4 parts. The lowest-priced set it comes in is 852697 Vintage Minifigure Collection Vol. 3 (RRP £11.75).

Check the minifigures carefully when buying a used set: they're part of its grade.