I send a message to buyers that have an e-cheque as payment, thankyou for your payment, item posted as soon as your echeque clears etc. Sometimes they are surprised as they did not select e-cheque.

Reason being, I discovered that PayPal sometimes turn a payment into an e-cheque if a lot of payments are made on an account or of higher priced items, without notifying buyer. If it goes un-noticed by the buyer, they may not realise the reason for the lengthy postage time.