Where to start Buyers and Cellars:
Darren Lightfinger, in his cellar under the house north of Lumbridge’s furnace.
Requirements to start Buyers and Cellars:
Completing Buyers and Cellars requires 5 Thieving; however, training will be offered to those of lower level. Post-quest Thieves’ Guild jobs will require increasingly higher Thieving levels.

Rewards:
500Exp in Theiving, 1 Quest Point [...]