Short answer, no.

You have to offer and accept paypal. The best way to get around it is to remind them when you send your invoice that cash on pick up is preferred so that they can inspect the goods when they arrive to collect and make sure that they are satisfied before they hand over their money. But some will use paypal for the convenience and that's all part of the ebay experience. I don't know why people don't want it, I don't care how they pay, I'd rather they just paid !