Block cost $200 and the last two cost about $75 each.
I also have a expensive Impwerks sport motor under the bench at work with about 250miles on it, it leaked and burnt oil and never run right, ended up re-ringing an old motor and its goes just as good I can't believe we still buy off him but some things are hard to find.
As for value I'm not sure they will be worth anything ever, I sold a couple on trademe lately,(on behalf) both better than new but original, Hillman went for $4500 and the Sunbeam $5500. The current hack is a $160 trademe special + just found a 1 owner chch new one for resto