I recently bought one for a friend. I saw them for $100 - $3000. Most were $300-$700 for complete "ran when pulled" examples. Mine was $700 with around $500 of machine work done to it already.
Here is an example in the Fresno Craigslist from today.
1961 chevy truck 235 motor complete top to bottom includes carburetor, intake, fenton dual manifold exhaust,
starter (rebuilt) comes with free powerglider 2 speed transmission and 53 bel air rear end. hear it run before I pull out. $750
