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
My Reef System: 215g Brick 72x24x29 Dual Overflows | 4x 250w MH | 4x IceCap 39w T5 w/ Actinics | MSX-250 Skimmer | 1/3hp Chiller | 16w UV | Aquacontroller 3 | Lunar Sim | AquaSurf |Tunze Wavebox | 2x Tunze Stream 6101 | MRC Dual Nano Calcium Reactor | GEO Kalk Reactor | Pan World 150PS Pump | Phosban & Carbon Reactors