The 150lbs of rock I added to my 215 gallon tank was all clean dry dead rock. I had it shipped and it cost about as much as you are offering - a great deal. I lucked out and it is great looking rock... just the right size and density. Great thing about dead rock is you are not inheriting any problems or pests - just nice clean rock. Coraline grows over time.

1. I looked at price (especially when buying so much)
2. Size & Density
3. Amount of Life / No Life