Oh, I don't know. I've dealt with people that were traveling and paid me a week later when they actually arrived at my house to pick up the item. Each case is different. If I agree to a deal, Unless the world comes to an end (family issues), I pay pretty close to with 24 hours. However, I may be away on business (this has happens) and I really don't like online payment methods if I can avoid it. So, I try for checks and agree to wait until the check clears before the item is shipped. I know, but there are dangers in every case, so, If a person insist on paypal, they should be prepared to contribute to the paypal fee.
To me the power and security always lies with the seller. If I receive a check, I wait until my bank tells me it actually cleared before I ship the item. If I or the seller lives close by (within 50 miles or so), I have no problem with them coming by my home to demo the unit and pay, or going to meet them at their home. I typically want to hear the item work before I pay, but sometimes that isn't possible.
I was in Europe on vacation once, and I purchased an item through Audiogon and the seller agreed to wait until I returned in a week for me to send him payment. He couldn't ship in to me until I returned anyway.
So, unless someone took forever to pay the OP, I really don't see a problem. A quick phone call, text or e-mail usually clears up the issue.
Just don't ship until you get paid.
enjoy