So my Xeon X5675's have arrived, my 6x4gb ram has arrived and last night, my U402f arrived! I Ordered the U402f "new" from Ebay and they sent me a heatsink that I assume was installed in a machine for 10 years, then the machine was put in a river for 2 months, they removed it, pressure washed the heatsink and shipped it.
It had unbelievable amounts of grime all over it, tons of tarnishing/corrosion all over the unit, fins where bent, the entire heatsink itself was bent etc.
I demanded a refund and got it in under 1 hour (almost like they knew it was heavily used) then proceeded to straighten everything and wet sand with 1500 grit the copper heatsink components carefully. It looks better but still lots of corrosion. Hopefully it works. When I was cleaning/drying the part, I used a blow drying to get any remnant of water in the fins (after compressed air) and the heatsink appeared to disperse that heat well. Now time to put this behemoth back together.
EDIT: the plan is to test the heatsink out. If it works as expected, I will use it. If it isn't as good, I will be buying a replacement. The refund can go towards additional upgrades for the machine, either another 6x4gb of ram, 6x8gb or the SSD Sata->PCIe plan I have.