'81 911 SC Oil leak question / Looking for mechanic Options

[rjames]

Sorry if I've posted this in the wrong forum, admins please move if necessary.

I have a cousin who's husband just died of cancer. He owned an '81 911 SC Targa that has just under 100k miles on it. He drove it sparingly up until about 10+ years ago when he parked it in the garage and it sat. Last November he had the engined 'worked on' so he could start driving it again. He then drove it regularly for 6 months up until May when he passed away.

In the last 6 months it has sat without being driven, ~90% of the oil leaked out. Upon quick inspection it looks like it had oil leaks from the pushrod tubes and the valve covers, but the bulk of the leak looks like it was coming from the front of the engine. I only had a vew minutes to crawl under it with only the light from my phone. Oil tank and cooler were clean.

I'm trying to help my cousin assess it's value (in part to detirmine if I should buy it). I've told her to find a good mechanic to get an asessement before moving forward on anything and if possible, try and find out what the last mechanic did to it.

Questions:
Would a bad main seal cause that much oil to leak in 6 months?

Anyone know a good Porsche mechanic in Spokane, Wa I can refer her to?