I bought an MFS-700 from Amazon Warehouse. When I opened it it obviously was not new, someone had returned three used and abused rails, two longs and a short. Needing to use it, I repaired the extrusions as I work with aluminum daily, the damage was done my over zealous tightening of various parts resulting in dimpling of the aluminum so I sanded the groves and every thing now works. My question is....how does one get Amazon to give some sort of discount rather than return. I know that in previous posts members have gotten Amazon to discount rather than return the items. I have made the MFS functional but should get more than the initial price as some parts are not new as advertised. If I return... one I will have to pay full price and two they will send it out to someone else.