One aspect you have to take into account is that a lot of the unkown or unavailable on vinyl tunes are the producers playing their own stuff that has never seen any release.

When you can get hold of them though it's good because you can pick up real nice tunes that not many in the UK will own. The only drawback I find is that when livesets are recorded sometimes the track can sound a lot better (usually because the bass is heavier) that what it is when you actually get hold of it on vinyl