James Asked, Have I Ever Paid a Bribe?
It seems like the "entry fee" style bribe is pretty common in countries with high levels of corruption.
Back in the early 90s, a friend and I drove into Bulgaria. The guard looked at our passports and said, "Fee is one American dollar". I have no doubt that he could "fee is one Deutschmark" in German or "fee is 10 drachma" in Greek.
Crossing into Turkey there was a little bribe shack in the middle of parking area for buses. It was really fun to watch the arguments and upset between the border guards and passengers trying to bring stuff into Turkey. Then they would go into the little shack and come out all smiles and smacking each other on the back and so forth.