It's worth every penny. People don't understand what it takes to actually build a quality bumper.
I built and designed mine from scratch, with the help of one friend. If we were to charge material and labor for my bumper it would cost over $1500 to build, and thats on the low end of the scale at 60 an hour, most fab shops are upwards off 100/hour. Now figure the shop building it has a solid design and jigs are all done, $500 is not unreasonable.