Okay, so I cannot easily find comps for this one...There is a VG on eBay that is asking over $400; the write-up says it is a tough book from a tough publisher. So I dug a bit. Turns out there is but one issue of this five-issue series on the census, #5, with two copies. Heritage sold a raw #5 (nicer than both graded copies; a VF range book) for $454 in 2017. So I do believe they're tough as touted, and sought after, but I am tempering the ask based on grade. No copies of this book on the census, and no sales I can find.
Oh, Brother #3 GVG on general wear and back cover tear. $125