How much does Google Apps cost?

As usual with Google poor documentation, it is not easy to have definitive answers.

Pricing for Google Apps

Edition	Pricing	Eligibility	Notes
Standard	Free	Everyone	Compared to personal account, addded value is minimal or even negative
Non-profit	Free	U.S., up to 3000 users, comply with some part of the U.S. law.	Beyond 3000 users, Premier with a 40% discount (40 $/year/user; there is no price in euros or pounds since Non-profit is only for the U.S.). Hopefully a complete feature set (contrary to Education), whatever the amount of users, but no evidence so far. Not to be mistaken with Google for non-profits
Education	Free	U.S. school
Business/Premier	50$/user/year (40€ or 35£; doesn't change with exchange rate).	Everyone	This starts from user #1, not user #51 (I have to check this, though). So, if you are 50 users using Google Apps Standard, think twice before upgrading!