All 3 look OK to me. Final values may still be higher on them.

2 of them have resolution high enough to see cross-hatching -- seems genuine.
The 3rd one (by "sir chips", a long-time member & poster to thechipboard) also seems OK, though pic's resolution is lower.

In the era these were made, the red & black colors were printed on separate print runs. I think the registration for the red $5 was a little off on the one you referenced. Also, the inlays were printed on a full sheet then cut out with a circular die, so the edges can be a little off at times, as in the one you referenced.

Just a coincidence that 3 of these appear at the same time, IMO.