I got the same scam 2 years ago. The tuk tuk driver was stationed in front of the hotel I was staying at. I said I needed a ride to such and such a place, not more than a few klms away. He gave me a price, then said can we stop at a tailors. I knew the tricks of the trade, as I 've been here a long time, but I had time on my hands. So off to the tailors. Nice place, all Middle Eastern people. A big shop as well, two stories, 10 or more salesmen wandering about. I thought about some silk for the wife. So he grabbed one 1st in line on the shelf and gave me a price. I liked the color, so we did a deal. I think it was 900 thb for enough to make a dress. I know good Thai silk is not cheap. So I finished my journey with the driver.
When I gave my wife the silk, she was not impressed. She told me it was not real Thai silk. Worth a hundred baht or two.
The next time I stayed at the hotel, the tuk tuk driver waved remembering my face and asked if I needed a ride. I gave him my best "evil eye" and moved on. Lesson learned, again.