Export regulations

I'm trying to fly home with goods for commercial use. Where do I find the export regulations relating to this? Is there a minimum value that will let me through without paying? And if below that value, can I apply for VAT refund?

You should find all informations and contact in the website of the Thai Custom ( english/thai ) for individual, business, others..

http://www.customs.go.th/wps/wcm/connec … omeWelCome