Pendy says the engine is worth $6500.00 having been rebuilt and with all the extra new parts included. I do realize that 300tdi's seem start out at $3500.00 by the time they get to the US. but that is for one just out of a junk yard in the UK. This one already comes with go fast parts. If you look at Rovers North they start at 8k for just the block. I can assure you I've a fair amount into this thing.
But ultimately who ever decides to pay the $6500 or convince me it's worth less will ultimately have a better idea of what it's worth. kinda cryptic but it is what it is. you are overly welcome to call 612-599-8715 and I'll chat with you, or better yet, I'll give you Pendy's number as he's far more knowledgeable than I am.
ps if you are interested in seeing where it came from, the trip to the UK is documented at: http://www.arlfour.com/gallery2/main.php
You'll have to look for "UK shopping trip". if you look close you can see it popping out of the sankey trailer on one of those shots.