The most expensive minty parts-correct M1917 I’ve seen was at the Ohio Civil War Show in Mansfield, OH and had an asking price of $1575. It’s possible to turn a negative into a positive if you could research and identify the origin of Troop C. There are ways to measure throat erosion without a TE gauge and No-Go and Field headspace gauges are inexpensive. Knowing the amount of wear could enable you to ask more $.