You probably can't use that functionality directly
You have to do this instead:
Paddle.Product.Prices(12345, function(prices) {
console.log(prices);
dmx.global.set('product1_prices', prices)
});
And then you dmx-text or dmx-bind the variable product1_prices to the element
Let me know if it works, I probably need to do the same in the future
P.S.: Thought you would be using Fastspring! Why Paddle now?