700 R4, what are they worth?

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I'm pulling a 700R4 out of my 84 K10 to put in a 350 turbo. It shifts good, don't know mileage, fluid looks good. Hoping to sell it to help buy parts, need the adapter kit for one. What are they bringing? I was going to stick it on Craigslist for $250, but is that to much? I haven't seen one sell in years, used to be they'd bring good money, but not so much now. Hope to sell it here local, what do you think?