For Sale Frustration!

Well, I agree, it's a pain in the *** but lately I am guilty of being the slow guy to respond. This is one scenario. I list some parts for sale and a guy asks if I have something else related to this part for his car, i.e. inner fenders. Yup, got 'em but I now have to do a LOT of work and go for a 40 minute one way drive to get them packed for a shipping price. It's a pain but as long as he is patient I'll get it done. I've been way too busy to spend a half a day with these things.
Ordinarily when I list something I have it handy and ready to ship so things like this don't happen. I did slip a little on a small part lately but it's all worked out and shipping today.