Vinyl records - where to buy? (Istanbul)

I was so fortunate to receive a record player for Christmas, and have already installed it in my apartment. I checked D&R who have a very small selection of vinyl records, but was happy to find Queen and Adele (yay!)

Where can I buy more records in Istanbul? I am sure there are enough hipsters and nostalgics to make up a market for it. Would prefer somewhere on the European side as I live in Bomonti :)