I did that to my Trek 520 about a month ago. If it wasn't in my car, I'd guess you had my frame (well, mine has more cracked paint around the dents).

I'm not an expert on frame safety, but a lot of people advised me my similar frame wasn't safe to ride, although they may have been taking my 50+ mile day rides, off road riding, and occasional touring into account.

Your situation is a bummer, but to look on the bright side that's not a terrible price for all those components if they are in good shape. Also, how's the front wheel? That much frame damage would make me worry about the front rim would be bent (it was on mine), as well as possible damage to the handlebars.

The only idiosyncrasies I had removing the parts to a Surly Long Haul Trucker is that the clamping diameter on the front derailer is smaller on the LHT, which was solved by a shim a shop gave me for free, and that the old steerer was 1", so I wouldn't have been able to use the same stem and headset if I wanted to (I didn't).

The quotes I got for frame repair are higher than the cost of a new production frame like a Long Haul Trucker, and are not worth it. Recycle the frame as scrap metal.

I'm not exactly sure of craigslist pricing, but you could probably get your money back (and maybe some more), especially if you parted out the components.