Arlington, VA - Is this a BAD estimate for Radiator/Boiler System Repairs?

[sonny4753]

OK, have a leaking radiator valve, and a leaking pipe that feeds the radiator valve, and I had a local company come out and give an estimate for 920.00 dollars.

Am I getting ripped off?

Here is the description from the estimate:

"Need to drain down the boiler. Replace both parts need to then refill, purge air and inspect for leaks."

Radiator Valve: 275.00
Boiler Drain: 145.00
Drain Refill and Purge: 500.00

I'll post pictures in a few...thoughts?