Gasoline cost 1 baht per litre. Airline tickets were very expensive, far more so comparatively than now. There were far fewer deals and package tours available. Flying full fare to Europe cost, if I remember rightly, something like 40,000 baht. It's not much more than that now.
Most Thai dishes cost between one and three baht.
Fish and chips at my local cost 15 baht. A beer was 5 baht in Happy Hour and 8-10 baht at other times. It was always Singh or Amarit. My wife and I celebrated our wedding anniversary in the Oriental hotel's Normandie Grill each year. To pay for it, we collected 1-baht coins throughout the year.