Pep Boys has the FloTool RhinoRamps MAX 16000 lbs, 2 Pack [pepboys.com]
on sale for $35.74 ($54.99 - 35% off instant online only) with free in-store pickup.
These are the heavy-duty ones and only a couple bucks more than the lighter 12,000 LB capacity ones.
Portable automotive ramps with a rugged and structural design
Provides reliable and convenient access to the underside of your vehicle as well as nestability for maximum storage space
CoreTRAC non-skid base helps reduce slippage
17 degree incline provides easy use for low clearance vehicles
16,000 pound GVW (gross vehicle weight) capacity
Extra-wide tire width