Went to a shop they said 100 dollars for the dyno they said they can put in a chip and a custom tune for 600-700 about 100 more if its supercharged is that fair or a little steep I herd about 500 is an average cost but is that with or without the chip he said 4-500 I can get it chipped with a factory out of the box tune. So 300ish for a custom retune after its chipped. Do the prices seem fair? He said he mostly does stangs but is not all he does. Let me know what you think?