Well, truth be told, it's really hard to put a price on something like that.
First and foremost, it's a used race motor, meaning its been pushed hard, and pushed hard more than once. anyone who looks at that will have in the back of their mind "Runs like a champ or not, low miles or not, it still might have something ready to pop."
Likewise, unless it comes with a warranty, or if you're an engine builder of some renown where you live, any buyer is going to be wary.
Second, it's very far from stock, with a lot of expensive parts in it. And by and large, the kind of person who wants/needs a motor like that, will build it themselves, or have someone build it for them, and have it built to their specs, with the parts they choose, to best fit their requirements.
Finally, a good portion of the people whom you're selling to, would probably be keener on just one or two parts off the engine/trans. The trans+shift kit, the heads, the cam, the shortblock, the intake+EFI the headers, are all things that tons of people on here and elsewhere would need, but parting it out leaves you the problem of ending up not selling one or two parts, and those could end up being big-ticket parts too.
However, most of what I just said applies mostly to selling it straight up for money. If you wanna trade it for something, there's much much much more potential value in it. I know of many many many people around here who trade motors for motors, cars for motors, rare/hard-to-find parts for motors. And even then, plenty of people will trade, say, a motor and some cash for a hot motor like yours, or a car, a few extra motors, and some spare parts. Especially when people are hurting for money like they are these days, you'd get a ton more for your motor if you trade it than if you sold it and bought parts.
