First Time Posting but seems like a good price!
Prices vary between $30 - $60 depending on lens selected.
Follow Steps below:
1) Go to the link below or Oakley's website and find the Holbrook Sunglasses, then select Customize.
2) Select the last frame (Prizm Tungsten). You should see the price drop to $20
for standard lenses. Price will Vary based on Polarized/type (the Prizm Golf lens is $30)
Shipping is Free.