Very collectable title - it joined up with Buster in early 1968. Loved the strip Captain Swoop - "Half Man, Half Bird, Half Wit" - that survived into Buster. The free gift with issue #1 Giggle Balloon is rare and adds £55-£75 to the value. There are no Summer Specials or annuals which is surprising. You would have thought a Christmas 1967 annual would have been a certainty.
From the 16th September 1967, the size of the comic was reduced in height by 4 cms, to save paper and reduce costs.
An auction lot of 24 issues fetch £124.76 on eBay UK in Dec 2010, average condition VG.
As with pretty much all British comics at the 60s and back, very high grade copies VF and above are very rare so values are theoretical!
Note: some PR issues may have no value. Selected issues in FN, VF or VF/NM may not exist in some titles.