The 61-year-old was killed in a branch of Poundland in the Oxfordshire town's Bury Street shopping precinct last week.
Mr Skrebowski, from Oxford, was in the store at around 11.20am on December 7 and was fatally stabbed inside the premises. A second man, aged 80, who was sitting on a bench outside the shop, sustained minor injuries to his hand.
A man wielding a knife was seen leaving the scene before being apprehended and overwhelmed by a member of the public, the shopping precinct's security staff and an off-duty police officer.
Trevor Joyce, aged 36 from Abingdon, later appeared in court charged with murder.
He was due to appear at Oxford Crown Court on Friday but, as ATG went to press, he had yet to enter a plea and it remained unclear why the attack had taken place.
A specialist in topographical, natural history and architectural prints as well as antique frames, print stands and easels, Mr Skrebowski was a long-standing and popular member of the trade. He previously had a shop in Portobello Road before later setting up a dedicated space for his large stock between Oxford and Abingdon, continuing to trade from the arcades of Portobello Road at the Saturday market for many years.
Kensington Church Street antique frame dealer Charles Daggett, who knew him for 25 years, said: "He was such a nice and decent man, and totally non-confrontational. He was very well known in the dealing community for prints and frames, and his death is a tragic loss.
"You sometimes hear about stories like this on the news, but when it's someone you know it's just incredibly shocking."
Mr Skrebowski lived in Oxford with his wife and three-year old twins.