I recently bought and fitted one a couple of months ago. Price was £128 with the fazer logo. Don't know what you think of that price? but if you're going to look at a gear indicator there over £70 just for that and the multi gauge does so much more. fuel, water temp, volts, outside temp drag modes(time your speed, revs gear change points) plus more.
A good handy man(biker mate) who can solder a few wires would be able to do it. It is easy to do. The instructions are excellent and straight forward.