Thanks for the responses. I posted this because I thought it was interesting but not a huge problem. I have several customers that settle up monthly but they are my regulars. From experience I thought my chances of getting paid were about 20%, but who knows.
I thought the suggestion to write the customer was a good one so I wrote;
I was a little surprised to get your message. It is unusual for a new customer to buy an item and immediately ask for 3 weeks to pay, what's going on? Is this how you usually do business or is this a special circumstance? Please let me know.
I quickly received this amazing response;
I apologize that you seemed upset re request. Yes. I have done this before. My record of paying has been quite satisfactory I have sent the payment today.If you were not willing to wait, you should have said so immediately. Your response was, in fact, quite rude.....Nancy
I don't think Nancy is my kind of customer.
It's not easy selling on eBay