Inside the building, vases, teacups, saucers and other crockery lay jolted from their places in cabinets and shattered multicoloured glass and broken stone covered the floor among pieces of silverware, a candelabra and smashed wooden furniture.
Sincan walked through the store salvaging what he could: a portrait of his father, a cartoonish image of Albert Einstein with his tongue out; a faded copy of the Mona Lisa.
In one room, a wall collapsed on top of his collection of Turkish antique glassware.
"I saved a bit, the rest is under there and I don't think it's all broken. When we tidy up here a few more glasses will come out, God willing," he said with a toothy grin.
'WE'LL REBUILD'
The earthquake left many of the historic buildings in a city with a strong history of religious diversity in ruins - including churches dating back to antiquity and many of the city's old mosques.
The imams who used to make the Muslim call to prayer five times a day also left, Sincan said, prompting him to take on the sacred task himself.
"I'm not hearing the calls for the prayers. I have been praying for 20 years, and so that hurt me," he said.
Several times a day, he climbs up the stairs of his building onto a patio perched above the street and, in a loud voice, calls believers to pray.
"It is a matter of honour for Turks. We say that the flag doesn't go down and the Adhans (call to prayer) don't stop," he said.
A man who has made a living from old things, Sincan said he took a historical view of the earthquake's devastation.
Antakya, formerly called Antioch, has been heavily damaged or destroyed several times over more than 2,000 years, both by earthquakes and conquest as it changed hands between ancient Greeks, Romans, Arabs and Ottomans.
Sincan said he was confident the city would rise again.
"Antakya has fallen six times, this was the 6.5th time. God willing, we'll rebuild it until the 7th time."
