An increasingly popular title for the Gerry Anderson content and general scarcity of issues.
There are some fun free gifts like an X-Ray Hair-Band in issue #2 (which came in red and blue as far as I know) and a monogrammed Lady P Hankie in #34. Free gift is issue #1 Signet Ring in box very scarce and adds £75-£100 to the value. #2 in VG with X-Ray Hair-band sold on eBay UK (Oct 2007) for £120. #2 in excellent with hair-band £150 on eBay UK (Dec 2007). A set of #1-23 plus the Summer Special sold for a very healthy £477 on eBay UK back in Apr 2008.
Aug 2011: a Lady Penelope free gift (from issue #1) ring fetched £98 on eBay UK.
Note: some PR issues may have no value. Selected issues in FN, VF or VF/NM may not exist in some titles.