Sell me that project Dr. Who and I'll be sure to do just that .
Seriously though ... just sell them the way you want to sell them that makes the most sense for you and your family. Not everyone is going to be happy. Some people take this habit, sorry, hobby to an extreme ... and not in a good way. Brace yourself for that.
As others have mentioned, give your close family and friends first dibs, then expand to local sales. Target people in Pittsburgh specifically with a project Dr. Who .
If you post an offer sheet, you'll probably get a lot of people knee jerk offering you cash then backing out once they figure out they can't get there. You also run the risk of offering up package deals, then breaking those packages up if someone offers you more, etc. You'll also miss bids here and there. I wouldn't do that.
I'd just break the machines up into categories (working, mostly working, project, basket case, parts) and sell them accordingly at a fixed price. It'll be crazy and hectic no matter which way you slice and dice the problem ... just make sure you don't let people get under your skin if things don't work out for them. Make your first sales your test run. Maybe offer up 5 machines (your "bigger money" ones) after you take care of your local sales to family and close friends ... see how it goes with whatever method you choose, and adapt accordingly when you offer up the next batch. It's not like you *have* to sell all of these in some fixed time frame ... know what I mean?
I was going to suggest having an auction, but that could introduce a whole other set of headaches (hiring an auction house, paying commissions, taxes, people getting torqued over minimum bids, etc.) ... so forget that .
One final piece of advice ... you probably want to stick with one and only one place to advertise ... if you post on both Pinside and Craigslist, you run the risk of two people asking for the same machine. That's going to confuse you and the buyers. I think you'll have your hand full on Pinside. I'd stay here (even though I check out your area on Craigslist ) since you know you're dealing with mostly collectors and you'll know all of your inquiries are coming from one source.
Outside of your project Dr. Who, I'm waiting to see your project/basket case/parts piles . It's cool that you're doing this ... some people don't get to experience a sort-of massive sale like this ... it's almost like a warehouse raid ... those are fun .