How about you go to the ATM, take out $400 and lay the cash in front of you on a table. Now you have two options:
I.) pay the shop $400 for labor.
II.) take about $250 of that and buy some tools (assuming you don't have any in the first place) that will allow you to do this job yourself (its really pretty straightforward and anyone that has ever pulled off a wheel or changed oil can do this without a whole lot of heartache)
The best thing about option II is that now you have the tools to help you do other tasks in the future. So its not really a cost, its an investment.
... or you can pay a shop hundreds of dollars to do something you can do in your own driveway in an afternoon. Up to you.
2011 Mustang GT M6 3.31s
Matt HONEYCUTT Tune, Lethal Off-Road X, GT500 axlebacks, J&M LCAs, UPR UCA, Whiteline LCA relocation brackets, Eibach Pro-Kit Springs, Koni STR.T shocks/struts, GT500 strut mounts, SR Strut Tower Brace
Best 1/4 E/T (05/18/14 MIR - no tune, X-pipe, or UCA): 12.920 @ 109.40 mph (2.059 60ft)