Obi-Wan Kenobi, Old, Tan Robes, Hair, White Pupils, Gray Beard, 3626cpr0638

Comes in 1 set, made of 4 parts. The lowest-priced set it comes in is 8092 Luke's Landspeeder (RRP £25.99).

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