Thanks a lot for this information. The range of prices is surprisingly wide. I don't think anybody can make a living at 100CZK an hour, can they? Perhaps it's the price practiced by students giving a few private lessons for their pocket money.
Country-wide data for the Czech Republic (before deducting mandatory income tax, social and health insurance): Minimum guaranteed wage per hour- 48.10 CZK (in 2007). Average monthly wage in 2006 was 20,211 CZK which (assuming 176 working hours in a month) translates to about 115 CZK per hour (but many if not most people here in CZ make less, Prague is different though, see here).
