Answer: Most of them were war prisoners, lowerclass or kidnapped people. The king got, "security", "friendship", guns/gunpowder, Iron, and mirrors. It wasn't really what they gained because they were exchanging "worthless" people in return for valueble trade items that they didn't really have access to before (there was no loss, till things went down hill for them).
Hitler claimed that 300 Sudeten Germans had been killed. This was not actually the case, but Hitler used it as an excuse to place German troops along the Czech border.