JeffWills wrote:

Hmmm... Icycles ships USPS, and a floor pump would almost certainly put
the package into the "oversize" category by USPS standards.

The Icycles website does say:
"FREE Shipping
over $100 within the Continental USA
Excludes Over-Sized Items And Auctions"

Griffin- Did the shipping charge not appear on the invoice when you
made the original purchase? If so, you might have a case.

Jeff

A floor pump does not make a package 'oversized' by any standard.
Bicycles can 'sometimes' be oversized, a floor pump, never, unless they
packed it in a bike box. Many MO places make $ on shipping, no secret.
Charge more than it costs.