Yeah I used to stress about it but then I had a very nasty experience with a buyer who after 2 weeks hadn't paid, I only had one contact from her right after the sale to say she wanted to buy more the next day is that ok? I replied yes and the usual let me know when you are done and I'll combine postage. at the 2 week mark I sent a message asking what was happening, did she want the item or did she want to cancel the transaction? I got a spewing of filth from her and negative feedback saying I attacked her??? (she hadn't paid). Took a couple of days working with ebay and got the feedback removed and added her to my blocked list and that's when I decided to stop being so accomodatiing. Unless a buyer contacts me and gives me an exact payment day (which is usually within the 4 days anyway) they get the UPI case opened and closed as soon as I am able. I don't send them a message or even worry about it. I've heard so many excuses and reasons but I know that I'm not so desperate for business that I will put up with rude or dishonest people. I've worked as a manager in retail and I always disputed the claim that the customer is always right. Manners and honesty are always right in my book. People who have a genuine reason to be peeved off usually are very easy to deal with, you fix the muck up and apologise. Anyone else is just trying to make you feel uncomfortable enough that you break the rules for them or give them free stuff!