What are the perils of shipping worldwide?

Just have funds wired to your bank account and there is no peril. Freight lines such as Pilot Air, Adcom, Yellow Freight etc. can take care of the shipping. It is a good idea to have them supply pallets and have the speakers banded on pallets. Much less chance of damage. Make sure you know the dimensions of your boxes or crates because you will be billed by dimensional weight or actual weight which ever is greater. Needless to say do insure everything that you ship.

I just shipped a pair of speakers to Italy through Danzas AEI Intercontinental, they were great except for the fact they misplace my speakers for abour 3 weeks. After a few weeks the buyer asked where the speakers were and it took a while to track them down, but we found them and got them back on the right track. Overall it was a pleasurable experience- everyone has a bad day now and again, no harm no foul. Good luck. ~Tim

If there is a dispute, legal matters can become complicated.

I have used BAX Global on many occasions of shipping pre & power amplifiers from USA to Hong Kong. If you want to save money on freight costs, ship your speakers airport to airport. I am sure your buyer in Singapore is willing to pick up the speakers at the Changi Airport.
Don't be scared of shippping worldwide, it is a much smaller world than you can think of. Also, BAX Global handles the shipment very carefully & promptly.