Found a Harry Potter lot on Craigslist:

4842 hogwarts castle - 100% complete w/ box and instructions

4867 battle for hogwarts - 100% complete w/ box and instructions

4865 forbidden forest - incomplete w/ instructions only

4737 quidditch match - incomplete, no instructioins or box

bag of spare parts that came with the set

 

All for $215.  I think its a decent deal because of 4842 and 4867 so I took him up on that offer.  Everything else is just bonus.  Probably not great for investment but its for my colection

 

What do you guys think

I think that's a fantastic deal, and I think if you didn't research the market values before you drove to a meet with $215 in your pocket, you should have. And you got lucky.

EDIT: harsh dude my bad. Anyway the castle is going for ~$235 shipped. And I'm envious you found a good deal on a used one, because you get to build it. Mine must remain sealed.

DO it. You can get the money back on just the castle.

I went for it, the guy was juice enough to drive to a location close to me.

Indeed excellent deal because the pieces look brand new, and the incomplete sets had all the minifigures. :)

Do it. Do it now.