Food is cheap and good in Thailand. There is something for everybody and a wide variety of flavors and cooking ways. The Thais in general prefer to eat products from the sea, i.e. seafood and fishes. Some pork and chicken but little beef. And in the north and north-east, they like to eat what westerners and Bangkok Thais seldom eat, the Thai bugs. It is more a snack than a main meal and they are usually fried. And not that cheap by Thai standards.
I was recently on the night market in Chiang Mai and tasted a bit of the speciality from that part of Thailand, the bamboo worms. Not too bad actually... 

But there if you prefer something with legs, it is available also

And here are the prices
