A man was stabbed with a hunting knife by a robber who posed as someone coming to pick up a mobile phone.
Jalees Ahmad, of Filton, responded to various social media posts and classified ads which offered items for sale.
But when he arrived to collect the gadgets, he would threaten his victims and steal the phones.
The 20-year-old carried out a series of knife-point robberies in a two-week period and during one of the incidents, he stabbed one of his victims.
The 35-year-old man was attacked as he tried to defend himself and he suffered lacerations to his hands and legs.
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Ahmad was sentenced at Bristol Crown Court on April 25 and was jailed for 10 years.
He pleaded guilty to five counts of robbery, one count of theft, five counts of possessing a bladed article and possession with intent to supply cannabis. A previous suspended sentence was also activated as a result of his offending.
Ahmad carried out the robberies in Hotwells, Clifton, Westbury-on-Trym, Keynsham, Kingswood and Weston-super-Mare between March 2 and March 13 this year.

Investigating officer PC Harriet Drewett said: “Jalees Ahmad carried out a terrifying series of robberies in which some of the victims were threatened in their own homes.
“In most of the incidents, Ahmad made off with expensive mobile phones which had been advertised on social media and classified ad websites.
“In one of the incidents, a victim was stabbed as he tried to defend himself. He’s still recovering from his injuries and needs crutches to get around.
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“Ahmad was caught after leaving the sheath for his hunting knife at the scene of one of the robberies. We were able to recover forensic evidence from the sheath which provided a DNA match to Ahmad. A fingerprint left on an iPhone box also matched Ahmad’s.
“During our investigation we located the hunting knife at Ahmad’s home and found CCTV footage of him topping up a mobile phone he used to contact one of the victims.
“We take knife crime offences like these extremely seriously and I welcome the significant sentence given by the court. I’d like to thank all the victims for supporting our investigation and I hope this conviction will help with the ongoing recovery process.”