'Course I do, but that wouldn't be fair to the first responder who gave me an address and asked for a shipped total. If I don't have his payment within a reasonable timeframe, I'll move on to next-in-line. That's how I like to be treated when I'm buying, so it's how I do when I'm selling.
(Yes, I wish I had a replicator like on Star Trek hey, can I borrow $20? Promise I'll give it right back! :D )