Well apparently there was some treasure burried with the lot I purchased!  Well treasure may be too strong a word but I thought they were interesting.

The monster manual was a 3rd plus print (4th print cover with 3rd print red end papers and interior).  I'm not sure how uncommon those are but I guess this is the right place to ask.  The value chart shows that they're not worth a ton of money (well that's 3rd  vs 4th print) but anything that makes a product different can increase its value.

The players handbook was a 4th print (earlier than my current one) and was in better condition than mine.  I figure that's a win as well.