Nice looking car, but it's not what I'd call "low rust." Based on a quick skim of the pics, it sort of looks like the bottoms of the A-pillars are nearly gone and the front fenders are pretty rusty. It's not a really rusty car, so maybe it'd be fair to call it "typically rusty."
But, since rusty parts cars go for $5k or so, I agree that this one might be worth more than 10k
To be honest, I have trouble viewing photobucket/etc sites (too many ads + distractions). I have only seen interior shots and one outside view.
You might look at it this way, if it's not worth 'x' amount, then what's it worth? Consider parts cars, parts prices, similar BMW prices, etc....
I personally like original cars and would pass on anything tampered with, that also goes for a disassembled car.
This is just my opinion, whoever shows up and buys it, gets it for 'x' amount.
MF