I collect a LOT of comics that most others don't, like issues from other countries for example. I personally LIKE the idea of the pence copies being available and actually would like to have a matching pence and cents copy in my collection, or at least where it's feasible to do so. I think they'll probably always be less valuable than the cents copies, as there is a tremendous herd mentality in comic collecting and I believe it would take quite a swing in popular opinion to make a significant change in the market. If I had to guess, I would say the main reason that they sell for less is that when it comes to larger sums of money, people are much more cautious and likely don't trust that there is enough of an established sales history for them to "gamble" on a foreign copy over an American one with a much larger proven sales history, but that's just a guess. If you're talking about a hundred or two, most collectors wouldn't be very concerned, but when it's multiple thousands, then then would likely question a purchase much more before making a decision. My 2c.