The red Sheaffers are items of significant cachet. They are scarce. They appear in niche categories: Loaner, Secretary, Pygmy. The bright red (quite unlike the orange of Parker's "BIg Red", etc) was not used in any major series by the four other members of the "big five", though Parker's low-tier (appearing in huge color range) Moderne did see this color. The color is... fragile, subject to discoloration and to cracks. It is not easy to find clean pens. I have a largely complete collection of pens, hard fought. At least the range is relatively limited.
While I have a number of pens shot in the photo lab, showign some nice features in detail, I'll toss up this rough shot, done at one of the Syracuse Pen Club gatherings. My Sony tends to show saturated reds, so this one pops a bit.
regards
David