You can do better than $500, but not much. I bought one and paid $430 including shipping. Here is the info:
Part Number
Part Name
Price
Quantity
Total
43430-04020
Axle Assembly
$428.45
1
$428.45
Subtotal:
$428.45
Shipping (Free Ground Shipping):
$0.00
Handling:
$3.00
Total:
$431.45