Is there affordable shipping from puerto rico

I would like to buy a component from someone in puerto rico. Apparently ups and airborne don't go there, Fed ex is about 100$ shipping. The seller uses USPS. Any thoughts? Is the post office ok to ship audio components? Thanks
I've had no trouble using the post office. I actually prefer it in some situations.
I shipped a pair of bookshelf speakers to Puerto Rico with the USPS, no problems at all. From here in Dallas it did take about 2 weeks. But they did arrive with no damage. And the price was resonable.
Maybe DHL. I would take post office over UPS.