Your conditions don't override ebays' but there is no PayPal protection on pick up items, hence not necessary to accept it.

So for the benefit of both buyer and seller, cash on pick up is the best option.

Buyer gets to inspect before handing the cash over and if it is not as described they can walk away. Seller gets cash without repercussions and no fees PayPal fees to pay.

Explain to the buyer there is no protection on pick up and you have had this confirmed here.

You can send the buyer here for an answer should they persist.

As well, cash means a chargeback can't be done months done the track.

If I receive PayPal payment on a pick up item, I refund the payment and advise they need to inspect the item before they pay. Adds credibility.