Sold a book to a Canadian resident on August 27th...money order was supposedly coming.

I contacted the buyer and they say that the money order was sent but must have been lost and sent another one out September 17th.

It's not a lot of money...like $20, I just don't know how long is reasonable to expect a replacement order to come from Canada. I want to believe everything is true but not sure how much longer to wait until I just pull the plug and relist the item.

Any thoughts would be appreciated.