I have an opportunity to sell a Hasselblad lens to a buyer in Singapore. The buyer is willing to pay via PayPal. I have no reason to distrust the buyer, but I have never sold anything to a foreign purchaser. Actually I have been more of a buyer than seller, and have never sold anything via Paypal. I am just a bit nervous about selling and shipping overseas.

Are there any dangers that I should be aware of before completing this transaction? Thanks for any and all advice.
Dan