Respond with a polite answer that this is not possible, as it is against eBay rules.
To proceed to just view, they would need to buy and pay for the item, through eBay checkout , no cash on collection is allowed.
Contact information can be exchanged at this point, ever before payment.
Buyer comes and inspects, if it's not to their liking, you need to cancel the order citing Buyer requests to cancel. This fully refunds the buyer, and your seller performance is not affected.
@smoothrunner
