Here is my Prexie shade collection:







I had the chance to pick them out of a large accumulation of Prexies I had access to. It is not as easy to do as it might seem. Many Prexie stamps suffer from poor plate wiping which leaves the white paper with a tint, and there is also the issue of toning of the paper, and both of these affect your perception of the shade of the stamp.
Some of the 8c and 11c shades were only recently added to Scott.
You'll notice I am still missing one of the 13c shades. I don't think it is scarce, I just couldn't fond one I was convinced was different among the ones I was looking thru.
You'll also notice it stops at the 25c value. I thought I found some different 30c shades, but when I looked closer I wasn't able to convince my self they were really different and not caused by the issues noted above. I do have one that is supposed to be an 830b (deep blue) that come with a photocopy of a cert for a block of 4 that mine appears to come from, but I really need to get a real cert. I should post an image in the 830b thread.