I love this question. If you posted this anywhere else, they'd review your meds but here in Stamp Heaven it's a normal Thursday.
I've always wanted to know what this is. Normal size Marvel comics NEVER cost 2/- at any point, so this is a massive mark UP on a second hand comic, not down as you'd expect. To an exorbitant price. AND it's been stamped on, anyone ever seen an actual comic dealer do that? AND there are PV's of this, so what is this even doing for sale in the UK? AND how many stamps are even on this? I assume it's just one, but it has an outer circle, an inner circle and a diamond centre. And a number at the top. AND it's a cents copy with no other stamps on it, so it seemingly wasn't sold in the UK at 10d and later resold at a mark up. It was only ever sold, as far as we can see, for 2/-.