Thieves threw fizzy drink laced with chilli powder into a man’s face after responding to an advert he had placed on a trading website.
The men had come to the victim’s home to view a silver Apple Macbook he was selling on Gumtree.
While one of them was viewing the laptop, the second man threw a fizzy soft drink laced with chilli powder into the 40-year-old’s face, causing a burning sensation in his eyes.
He was also hit around the head.
The men grabbed the Macbook and ran out of the house.
The incident happened at 7pm on Monday March 23 in Towersey Drive, Thame and the victim was treated at Stoke Mandeville Hospital.
The offenders were white, in their twenties and wore jeans and bomber jackets.
DS Peter Scott, of Didcot CID said: “We’d like to reassure the public that incidents such as these are very rare, and there have been no similar reported incidents.
“The victim was selling their belongings through an online site, and we’d encourage people who are interested in doing this to meet up with your potential buyer in a public place where lots of people will be around, tell people where and when you are meeting the buyer, and to leave if you feel uncomfortable at any time.
“Get Safe Online and Action Fraud both provide really good advice for safe online selling and buying on their websites – www.getsafeonline.org and www.actionfraud.police.uk.”
Anyone with information is asked to contact police via the 101 number.