Buyer gets error 'Ran into a problem' when trying to complete a purchase

[au2015.bhal]

Buyer requested i switch on international shipping, which was done. Within 30mins-1 hour, buyer has nominated to purchase from his local countries' eBay site and receives an error 'We ran into a problem', and he cannot complete the purchase. 
Any advice or insight appreciated. Thank you.

[*casey*]

"Buyer requested i switch on international shipping"

Is it the $700 Burberry item   with 'authenticity'   guarantee  ?

Not eligible if the buyer's address is outside Australia ?

https://www.ebay.com.au/help/selling/selling-tools/ebay-authenticity-guarantee?id=4644&srsltid=AfmBO...

IF  that's the item, it's possibly  a scam buyer