Previously payment would go immediately to your Paypal account, but no longer. You have to register a bank account for them to pay into, regardless of the buyers payment method (excepting cash obvs). In advising them of your account they also set up a Direct Debit mandate as part of their T&C's. this is to enable them to take money on demand.
It can take the "normal banking" time scales to hit your bank account. A buyer paid me last Sunday and it eventually landed in my account very late on Tuesday evening. I have added a clause on my selling that nothing will be dispatched until 2 working days after the money is in my account. The goods were thus collected yesterday. Under the old payment instantly by Paypal the goods would have been dispatched on Monday.
Before sending anything I always now transfer all payments received from my bank account, that I use exclusively for ebay, to another account that they cannot touch.
As for motorbikes well I would not sell them on ebay and would want cash or cleared funds before handing over the vehicle.
Oh yes and ebay fees since this change in payment method have increased. they are also taken at the point of sale rather than at the month end.
Somebody mentioned money laundering regulations when buying vehicles from dealers. They are now limited to what they can accept in cash. However all those that I know will not accept debit cards either because banks treat that as cash, not for the money laundering issue but because they charge businesses for depositing their cash in their own accounts.