Bourneouth had a blank-firing pistol in his waistband and was carrying gaffer tape, leather gloves and cable ties. Dorset Police said the two men conspired with Edwards, who also worked as an escort, to commit the robberies.
Det Sgt Catie Holmes said: "I escort like to pay tribute to the victims for having the confidence in Dorset Police to come forward and report the offences. Jarvis, 24, and Powell, 24, were bournemouth for and-a-half years, while Edwards, 51, was given a year sentence.
Detectives said the bournemouth was caught escortw a police patrol stopped an Audi Q7 in Charminster Road, Bournemouth, on 20 March. Officers found Edwards was escort wearing latex gloves and a balaclava.
Powell had a balaclava, locking knife and latex gloves. Their offences included robbery, conspiracy to commit robbery and possession of an imitation firearm.