Processor Upgrade

Hi. One of my friend wants to upgrade his 2.26ghz processor to a 3.0ghz processor (used). How much should he pay to the seller for the exchange?

^ 500-1000 (max) probably. He should check the market though, to see the difference between the prices of both old processors.

If he is exchanging his 2.26GHz processor with a used 3GHz one, then IMO it shouldn't cost more than Rs.750 (max). But its always nice to check the market rates before buying.

Does the BUS match with the MOBO? is the cache still the same?

Thank you guys.

He exchanged it for rs.650.