I started off buying quite few compilations which, for 10 - 12 year old, were dead cheap
You Can All Join In ( Island)
Nice Enough to Eat ( Island)
Harvest - A breath of Fresh Air ( Harvest)
Happy to be a Part of the Industry of Human Happiness ( Immediate)
Tracks 5 - The Who one side, Hendrix the other
Alongside this, from memory, the first few include
Abbey Road - Beatles
Electric Warrior - T Rex
Split - Groundhogs
Atom Heart Mother - Pink Floyd
Led Zeppelin II
Those were pretty much all bought in the last year of primary school/ first year of secondary. I had a great group of friends, most with older brothers who bought tons of records. We had a couple of long haired trainee teachers in the last year of primary who played their Led Zeppelin records ( I and II) to me and may mate Duncan at lunchtimes.
At the bottom of our road, and literally next door to my primary school, in Potters Bar was a youth club which one night a week was the Farx Club. Their bill in 1970/72 was amazing -
http://www.pottersbar.org/elmcourt/farxclub/
Funny to think most of the people who went there must be pushing 70 now. We used to look at the posters outside the club and wish we could get in. All we went to was the Donkey Derby the day after one of the shows.
Kevin