You can get the leg levelers far cheaper from Bob Roberts.
That IS the price from Bob with shipping.  I added the sipping for the levelers and the corner guards to the total for the levelers.  Here is the breakdown:
Item(s)                                   Purchase Price      Shipping
T-molding (20ft Black 3/4)   $7.50                      $6.50
Corner Protectors (4)   $12.00                      $0.00
Leg Levelers (4)                    $3.00                      $6.00