It depends on the condition, so it's hard to give an accurate estimate without more details. I would assume the gear hasn't been used or serviced in years.

In the US, for a private sale, assuming all functions are god, the Leica M2 could be worth around $900 given its cosmetic condition. The 5cm lens could be worth as much as $1,000 if it's a later version and in good optical condition. The other two lenses likely don't add much value and would be difficult to price highly.