I just bought a high value item on Bricklink. It is ~$150, from a seller with 3 buyer feedback, from last month and earlier this year. They have this item and one Ultra Agents minifigure for sale from their store. They say that shipping on this set will be $5, which is the main reason I am suspicious.
I know new sellers sometimes price things a bit below market value- this set isn't a spectacular deal, but now with all this, I feel a bit on edge. What are the chances that this is a scam?