If my 92 honda key isn't working, can I replace just the part where the key goes in, or do I have to do more?

They are telling me that with installation, it will be like $300 at least, My friend just had the same problem, but in an much older pick up, but she said they just replaced a small part where they ket goes in?

The key goes into the ignition cylinder, which in turn moves the switch box. The switch box is where all the electrical contacts are. The ignition cylinder can be removed & replaced without bothering any other circuits. Look on e-bay for replacement cylinders - They come in two ways: The first is an unassembled ignition cylinder. IF you have a decent ignition key, you can get an unassembled cylinder. Take the best ignition key you have and the unassembled cylinder to a lock smith. He can assemble the pieces so that your existing ignition will still work in the new cylinder. The second way it comes is completely assembled and with a new ignition key. Have a garage install the assemblied cylinder, and you drive away with the new ignition key.