How to program a key to 2000 Nissan Maxima?

I may suggest you call the dealer. I asked when I bought my car about getting an extra key and they would have to order it for about $30 because of the electronic chip inside it. ** I found you could buy a 'chip' key on Ebay and have it programmed thru a locksmith for cheaper than at the dealer. Some of the higher end locksmiths have the computer to program the key. Also, when i checked at the dealer they wanted $90 for the key and $60 for the programming.