Any sanding will remove part of the inspectors cartouche, no argument just harsh fact.
As a collector I grimace when I hear about guys who "sanded" their military stock.
So, what is the difference in dollars between sanded and un-sanded... this all depends on how much sanding was done. If the stamp in the stock is barely legible, a $300 reduction. If the stamp is clear, legible and completely level with the surface of the wood though not razor sharp drop $200. If the stamp is still clearly impressed into the wood with sharp edges then no reduction. Conversely, when pricing the above numbers can be added to a base price for a firearm.
VERY IMPORTANT...the color of the finish on the metal. If it is deep greenish dull finish (aka parkerized) this is the original finish as they left the factory. There are occasions when the finish may have a grey appearance, with a hint of green...once again parkerized. If the finish is dull black, it has been re-furbished...generally at an arsenal, there will be stamps in the stock to indicate this, which will appear sharper then inspectors marks. If the finish polished deep or even mottled blue, then bubba got his hands on it.
For $1,000 the gun should be perfect in every manner. Razor sharp edges to the wood, the inspector marks sharp clear, perfect, the metal should have full parkerizing and there should be absolutely no bright wear marks on the bolt as if it has been worked a lot, the bolt face should be perfectly clean with no evidence of brass on face....in other words for $1,000 the gun should be UNFIRED NEW!!!!!!