UMM? This is exactly what this seller is saying.
You cant exactly make an error with the proper dimensions from a uncut sheet of two notes. Cutting an uncut sheet of $2 is far more difficult (relatively speaking) when compared to cutting those 4 Note uncut sheets that the BEP sells to the public.
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Notes like the above are being sold for $80-100+ on you know where. Members of the US forum Im on were able to back trace the notes, he sold as errors, to the uncut 4 note sheets that they were cut from.