I believe they are expensive because: * They have a captive audience and no competition inside the security area in the airport - people who want to sleep betw

I believe they are expensive because: * They have a captive audience and no competition inside the security area in the airport - people who want to sleep between flights, but can't/don't want to go through passport control, customs and security to a hotel, * They have to be cleaned between each visitor, many times per day.