I came across a 1976 $2 that the printing is nearly at the edge of the paper. How far off does a note have to be to be considered an error to the point that it has value? I'll try to scan tomorrow when I have time. Thanks!
I personally find an off-center note to be less valuable than a perfectly centered note. I would personally need to see at least part of the next note on the opposite margin, before I would consider it to be an error. Keep in mind that a lot of people are selling mis-cut sheets on ebay, and pawning them off as BEP errors. One way to tell is to look for serial numbers that were sold in sheets by the BEP directly to collectors. Even though the margins may be off on a note, it can be either a cutting or printing error. If the obverse and reverse of the note are aligned, you're likely looking at a cutting error. If the obverse and reverse of the note are not aligned; for example, the obverse is perfectly centered, while the reverse is significantly shifted, then you likely have a printing error.
Scan helps, if you can see part of another note (usually a badly shifted second print), that is usually enough of a shift to add value. However, notable sideshifts of the third printing - say of a half inch shift out of register with the 2nd print - can add value. Something on the order of a 1/4 inch or less is pretty minor and adds little value.
