Current R163 offering on Ebay
Coincidence? Two days ago I browsed the APS sales website for the first time, and found an R163 pair listed as an imperforate, or more accurately, imrouletted pair, and with a catalog value of $500. Lo and behold, today, Stuart Katz has put up a block of R163 and lists it as an imrouletted block, this time with a catalog value of $1000, and buy it now price of $450.
In both cases these are not imperforate or imrouletted stamps. These are part-perforate or part-rouletted stamps, and only on the horizontal. The vertical rouletting can be clearly seen in the scan above, for example. I don't have a copy of the Scott Catalog with me right now, but pairs of part-rouletted R163 should be listed for $8. Yes, eight, and not hundreds of dollars.
To see a legitimate imrouletted or imperforate R163, see this post from over two years ago. A survey of rouletting varieties on R163 can be found here.
Partially rouletted R163s are common, and I have seen many pairs and blocks. The referenced imrouletted copy is the only one I have ever seen.
Stuart Katz's errant listing on Ebay can be found here. The APS responded quickly to an email I sent and wrote they would take the listing down.