I have a 2004 HSE that had a single key (in bad shape) when I bought it. I called the Land Rover dealer and was quoted $300 for an additional key. Instead I bought a AK90+ key programmer and blank key fobs off of eBay from programtheremote.com. The EEPROM chips in both the keys that I bought couldn't be programmed, so I got some PCF7935AS transponder chips from Locksmith Keyless for $3.70 each and fixed that issue. I now have 3 working and synced keys.