The two days I spent in Istanbul were the most rewarding. I was hyped up on coffee for the entire 48 hours, shocked a man by telling him we make ice cream from yogurt, crossed over into the continent of Asia, and took in a whole lot of culture (the Blue Mosque during Ramadan was absolutely breathtaking). A beautiful welcoming city that I would recommend. No second hand though. -_- lol
Feel free to ask for any info if you're taking a trip!