Is this quoted price fair for some engine work?

Hi all,

My engine has shown some oil leaking around it for quite some time and I finally got around to having it looked at. My Saab guy basically says I need an 'engine update' which will replace some hoses and basically 'roto-rooter' the whole system. Here's the prices from the quote:

VCG (valve control gasket): $200

CCV (closed crankcase ventilation): $350

O/P (oil pressure) switch: $200

Do those seem like fair prices to you guys? There's 2 other Saab mechanics within 10 minutes of his shop, so I was wondering if it would be worth calling around for other estimates. Any help is appreciated!

Thanks!