The accepted offer was actually $15.00 shipped instead of + shipping.

Yes, you are right. Asking price and full asking price are the same thing. My previous post was the result of poor proof reading on my part. Sorry about that.

You could ask the seller why he chose the other offer instead of yours, but my guess would be location of the other buyer. I know it may not sound right all of the time, but the seller does have the right to choose which ever offer he wishes, and for what ever reason he wishes, instead of being required to accept the first offer that meets his asking price.