It needs to be updated.
Now :
Tourists who buy goods worth less than 20,000 baht would not have to show them to customs officials during the refund process. Until now,the upper limit was less than 5,000 baht. The minimum price of ornaments, ornamentalgold, watches, eyeglasses, pens, smart phones, laptop and tablet computers, bags (excludingtravel bags) and belts that must be presented tocustoms is raised from 10,000 baht to 40,000 baht.
Extra information :
I am at airport after almost 6 months in Thailand.
I made a short trip to Laos so I last entered in January. VAT Refund office told me I couldn't be considered as a tourist since I stayed more than 3 months (108 days) . They refunded me this time but told me they would not in the future