Well, it's different when it will come from Philippines to another country. You can't have balikbayan boxes from the Philippines as it's going outside the country. Although they have that but prices are different compared to balikbayan box prices as they calculate it by weight. Anyway, you can try looking for shipping companies which offer per cubic meter container spaces and check if they have prices that will cater for a few of your boxes. But in my case, I found Philpost the cheapest. My mum's company has freight businesses as their clients and she tried inquiring from their clients about shipping my things to UK and we both found it very expensive as well.