iridium autolight spark plugs gaped to 0.60 and parts store plug wires.
a plug and wires change is like a 30 minutes job for some one who has no clue wtf they are doing, as long as you have a oz of mechanical ability you'll get it done. super easy.
they rape you for a damn tune up too. should only cost you around 60 or so tops for new plugs and wires in hand at a parts store.
a garage maybe as high as 300. for what, taking 6 plugs out and replacing 6 wires? come on.