People generally answer questions like this by telling others to look at completed
ebay auctions. They would also likely tell you that you should have provided links to the auctions in question. You may not be doing the later in fear someone here may "steal" your coin. The one's you've mentioned are uncommon enough that they can pretty easily be found.
First off, an 1885 3 cent nickel is going to require very varied winning bid amounts to purchase it. Some may exceed fmv, others may fall short of greysheet bid. btw, many people are probably sitting on it, waiting until the last few moments, especially if the price is very low...I wouldn't count on a key date in good shape going unnoticed. A proof will have the mirrored fields, though admittedly, it's not as easy to discern on 3 cent nickels than anything made in the 2th century.
an Fair/AG 1885
V nickel could go from anywhere from about 150 to 350, depending on how much "fair" is in the coin and if there are any additional problems like cleaning or corrosion.
Holed coins are tough. Less than G-4 price though unless it's an extreme condition rarity and desired coin, which 1875
Trade dollars are not.
No idea on civil war tokens.