
The first time was a week ago and his WTS was about 30% less than most traders out there. Everything looked fine but I noticed he had traded 100g along with the mini for some reason. I thought nothing of it, assuming it was a typo or mis-hit button.
Today, he spams another mini significantly under priced from the current market (I believe) and from other comparable minis in his WTS post. Again, I trade for it and noticed the extra 100g added.

This can't be the same mistake again, it has to be for a reason. My fear now is that I traded for a duped mini,

So does anyone know why the 100g was added to the trade of the mini? The mini appears normal and I see no evidence of fraud, just two consecutive 100g transactions added to the original trade agreement.
Thanks!!