I'm several thousand miles from the bulk of my collection, but some of my rarer / more special stuff includes…
The Halfpenny Marvel issue 1
The Halfpenny Marvel issue 5. Sexton Blake's first story was in issue 6, but it was announced in this issue, making it his first "apperance"
The Halfpenny Marvel issue 11, with the third Sexton Blake story in it.
The first 24 issues of Union Jack from 1894, bound without covers. Including the fifth or sixth ever Sexton Blake story (for years people thought it was the first) in issue 1. It's also complete nonsense!
The first 25 issues of Pluck from 1894, publisher's file volume
The first Chums annual from 1892 - 3, it's a big hardback, so probably not mega-rare, just not often sold. I got it for just £25, a VERY lucky Ebay buy-it-now find. Good condition, too. Shame I'd already read it's most interesting serial in book form.
Publisher's file volumes of The Boys' Friend, from the last 6 months of 1909 and the last 6 months of 1910, fantastic condition and even with some of the free gifts included
I also have two year volumes of The Boys' Friend making two solid years from may 1902 to may 1904, I bought them from Ebay sellers at separate ends of the country and about 2 years apart, but the identical bindings (and identical severe water damage, unfortunately) suggests they were once part of the same collection, now reunited!)
What might be a publisher's file volume of 6 months worth of Pluck from 1913, if it isn't, the quality of the binding job and clarity of the spine description suggests it was once in some other library or archive.
A grand double number of The Boys' Friend from 1915, which was a partial re-launch with all-new serials and a colour cover, decadent stuff for the time.
Several loose issues of The Boys' Friend from over the end of WW1. Unfortunately at some point around 1917 it had become extremely dumbed-down (by the standards of the time), it doesn't even directly mention the victory. The pre-war version would have filled a whole issue with triumphalism.
A post-WW1 issue of Union Jack with it's free coloured plate of the victory celebrations included
Three quarters of the issues of the Boys' Friend Library from 1933, publisher's file volumes
A wartime edition of Shonen Kurabu, a Japanese story paper for boys.
A handful of post-WW2 British made "slicks", which imitated the style of American comics, though usually with far fewer pages and only two colours (if any) for the interiors.
The 1947 Comicolour Album, a hardback book of humour comics which are all in "colour" (only two each, though). Bet they didn't print much of those, with the shortages of paper, ink and… everything, really.
The 1950 Radio Fun Annual with the rarer Tommy Handley cover. That and the above annual were found in a proper treasure trove shop in Cambridge. Took some digging, though.
A heavily-illustrated story pamphlet thing in Korean from 1959. I don't even know if it's from the north or south, but I'm leaning towards the north, because it's all in Hangul
A North Korean monthly story paper / "pulp" from November 1967, found in a sadly-defunct shop in Osaka.
A bunch of Howard Baker reprints of 20's - 30's British story papers from the 60's to 80's, several of which are as rare as the things they are reprints of, these days! Got the first 10 issues of Bullseye from the 30's, in an early 70's reprint volume, from a book fair in Cambridge.
A French comic from 1978 which contains reprints of manga, including Golgo 13, called Le Cri Que Tue.
Bound volumes of the first 90-something issues of New Eagle from 1982 onwards, including a shitload of the free gifts that came with it, and some assorted other memorabilia, all in near-mint condition.
An assortment of issues of The Victor (many from Christmas) from 1982 - 1992 with free gifts. All in as-new condition, they even smell new! The whole lot was only about £5 from a charity shop in Lincoln.
The first and only issue of Pulp Detective, an ill-fated British story paper from 2012 that came and went with few people even noticing.
And a bunch of 21st century small-press crap that might have only had print runs in the 10's.