What is the value of this motor?

What might an ebay market value be for this:

1967 Shelby G.T.350 289HiPo(w/ the Cobra high capacity oilpan, valve covers, etc)

all original down to the distributor cap, a little dirty but does run. Mileage around 100k and has no problems but would probly be a rebuild candidate anyways. Correct carb and all in place.
 
I saw one awhile back from a '66 Shelby go for around 3k if i remember correctly. I ask this b/c I may be getting one here soon along w/ C-4 as trade for a 428 my buddy wants to put in his shelby instead of staying smallblock. And as much as I'd like to have that motor setting around my basement for somethin I'd rather have the money b/c I might could get enough from that to fund getting a new project.
 
Around 3 to 4k for a complete HiPo motor needing to be redone is about right. Is the engine VIN stamped? If it is and you were able to find the owner of the Shelby that this motor belongs in, the selling price could get really interesting.