Today someone asked me to take photos in some specific poses he chose and offered to pay per image. I don't think I would mind doing this, but I thought I might get some advice first since this is pretty new to me. Does it happen often? What is generally the price per image? Should I be wary?

I have shot commissioned sets before. Client wants blonde/brunette/redhead in situation A/B/C - whatever it may be. I cast for those looks, for that kind of shoot, and go for it. Pay is a couple to several hundred bucks, IME.