Ive never paid more than 150 baht for a t shirt in Thailand. I have and still can get a beer from a bar for 60-80 baht. 40 for a litre of the most expensive gas for the bike. Bottle of leo from 7/11 up from 40 to 47. Me and my partner food and a drink at a thai shack for about $4,120 baht. The price of rice and gas (petrol) are rising though.
The prices i have quoted are in Thais 2nd biggest city but i can get similar in their premier resort (most expensive) too.
Hard to see the Thais diverting their rioting from the political mess they have though.