It is probably worth noting that I assumed you told the seller you would bring cash, so that the seller can make even more by not paying both ebay and paypal fees.

I would guess that any sort of profit built-in to the shipping cost would be much less than the amount of additional profit from not paying fees, so I definitely suspect that the seller is trying to hide something.

If he has a very large amount of positive feedback (e.g. 99% or more), then I would be more inclined to give him the benefit of the doubt.