I just did my front & rear glass moulding. It's not perfect but pretty damn good. It is a lot of work starting from the ground floor & trashing around to find the best method...but the cost is not bad....IF you already have a bench grinder.
Personally, being a DIY guy, I'd rather invest my money in tooling....but your price is not bad.
The price you quote is way below that of a pro shop. Way below. I was quoted over $700 by one high end shop that specialized in the process. If you calculate the hours it takes to do it right* I'd say you are below minimum wage on the job.
*straighten, fix dents, sand out deep scratches and finally multi-stage buff