Never grinded on, just a little dirt on them from climbing a few stairs. This is really only dirt, no loss of material visible. Mint condition.
The wheels ship from Gemany. Worldwide shipping is no problem.
Freddy was selling his new Higgs for 30 € a few months ago and I am going for the same price.
Just looked it up real quick: shipping to the US would be 6 € without insurance and 8 € with insurance. This insurance is in fact a tracking number so you can look the envelope up on the internet during shipment. Once the wheels reach you, you have to sign a receipt.