Unfortunately all you ever seem to hear, or sometimes read on here, is 'I found it cheaper at .....', '...save a few quid....', '...why is the club shop more expensive?' Reality is people do not seem to act on their own words. For what it's worth, for anything I think 'critical' I tend to source it from somebody who actually uses that item/spare in their line of business; using Jigsaw Racing costs a bit more for just that re-assurance.
Got that of my chest!