I want to add some facts.
I have been going to Savanakhet for the last 7 years.
1800baht entry, I paid 1400baht not so long ago. I'm Australian it use to be 32-33usd.
Immigration didn't stamp my wife's passport, despite giving it to them. This is partly my fault but they also normally check before exit as well.
I showed up at 10am gates were closed, immigration requested a bribe 200baht, happy with that considering how long the line was.
I was 198, the line was huge.
Going back to Thailand we were dragged to the head honcho office for no stamp. 3,000 baht, I talked him down.