Nope, sorry this is not allowed. No contact details are allowed before purchase.
Message the buyer explaining these rules, they have to buy and pay for the item, then allowed to come and inspect, if the item is not to their liking they do not hand over the collection code to you, and you cancel the order citing Buyer Requests to Cancel.
This fully refunds the buyer, your seller performance is not affected and you can relist the item for sale.
@anet6922