$4200 for a "full wrap" is actually pretty damn good. We're lucky out here on the East and Lee's prices (as well as the quality of his work) is the best I've seen around here.
For comparison, if you just wrap the front (which most of us did this instead of getting the entire car wrapped) is probably around $1800 from Lee. Other quotes around these area that I had received was around $2200-$2500 just for the front. In California, "just the front" would run you about $3500.
For a full wrap, the quotes I've seen on these forums in California are $7500-$8000. So Lee's price of $4200 is really freakin good in comparison.