Isn't the highest for these 5000? If so then I wouldn't trust it under an AV. I've thought about it for the vette, but too much money for a tool that can't be used with all of my vehicles.
My first seacrh brings up a 2 post 9000lb lift for $1400.
http://www.bestbuyautoequipment.com/auto-lift-symmetric-9000lb-2-post-lift-p/AL2-9KSC.htm?gclid=CILB3cOe09ECFYQvgQodM94Iiw
I am sure with proper research one can do better and get more what they want.