I can't remember what I paid him (rcplanebuyer) for grates but however much they were they were totally worth every penny. I have not cleaned them more than using a Char-Gon on them, so I don't know if "used" ones will shine up but I can tell you that you could use them as ramps to do an oil change on your car, and the only bad thing I can anticipate is that they might damage your tires. Those things are incredible!