I believe (correct me if i'm wrong) that this tour is the first time autographed photos have gone on sale.
At a tenner, they are pretty good value (certainly better than the stuff that turns up on ebay, most of which is crap) and I think it was a good idea to sell them during the last UK tour as it's pretty much the last chance for folks in the UK to get an autograph.
What I don't like (as many have expressed themselves) is when people buy these autographs with the sole intention of selling them on at big profits.
They're no better than ticket touts.
Vultures.