[n00b on demand]

ok ive seen so many pics of the reverse glow gauges for the svx and i want them so baddddd. they look so good at night and i just have to have them. ive seen it being sold on ebay for about 40 dollars and 60 dollars. i have bought alot of things on ebay before but when i buy the gauges im afraid to put them in myself because i dont want to mess anything up. i dont know if a regular mechanic would do it so im not sure what i should do. advice on this matter would be great!