as a result of the thai government crackdown, restricted supply has had an effect on prices, further curtailing the popular use of "ya ba". in 1999–2000, when buying a straw-full (around 20 pills) in chiang rai province, north thailand, "ya ba" was sold for around 10 baht per pill and commonly used on the go-go circuit and by young "mtv" clubbers. retail prices have risen from 100–150 baht (us$3–4) to 250–450 baht per pill as a result of the crackdown, though it remains a popular party drug.