Paul,
Craigslist is great.
Go high on the price too. It is a lot easier to lower the price than it is to raise it.
In the fall, I'd say lower. But right now? For nucs, I'd have them around $100+. Full size hives, ready to go go into full honey production? $250 isn't out of line right now, considering that equipment runs about $150 for a full size hive, and each hive is basically 4 nucs (or more). Plus you can consider that 10 gallons of honey it will produce is worth at LEAST $300! :).
How 'bout this:
"Full size honey producing hives for sale $400. Packed and active, they are storing honey right now, with a potential of 10 gallons of honey or more which can be sold for more than $30 a gallon, these hives will only cost you $100!!!"
On the other hand, you could also try "parting" out a few hives into nucs.
Now I've got some more used cars to go sell :roll:...
Rick