I became a huge fan in 1991, the period in between No Prayer for the Dying and Fear of the Dark (two albums I bought today on vinyl). You could say I'm a rare species on this forum. Most people here became a fan since the "reunion era", since the "golden years", or since the "Blaze years".
I am from the often neglected, and IMO also often underestimated early nineties period, when Grunge started to take over.
It all started after having heard a recorded cassette of the debut album during a Scouting camp. I have never been so addicted to new music after hearing this stuff in my walkman. I was completely in another world. The two tracks which totally triggered me were Prowler and Transylvania. The tape was from a nice bloke who told me I should have a listen, I might like it. The other side had Kiss on it. Liked that as well! You could say I literally got into both bands on the same day, but Maiden hit me harder.
After getting hooked, I bought the Live After Death LP-set (2nd hand of course), plus the Sanctuary 12" vinyl single, which I chose because Prowler was the b-side on it. Perhaps I bought the single before LAD, or even both at the same time, can't remember :--/
After LAD I bought two videos: 12 Wasted Years and The First Ten Years.
First bought studio albums (also in 1991): Two at the same time: Somewhere in Time & Piece of Mind. I just HAD to buy SIT, because I was totally mesmerized by the fragment of Caught Somewhere in Time that I knew from 12 Wasted Years.
Before I bought my first studio albums, I already knew Killers, Seventh Son Of A Seventh Son (which I both borrowed from a classmate) and the before mentioned debut album.
After this, all went very fast and I purchased all Maiden albums before I witnessed Iron Maiden for the first time ever in concert, 2 September 1992. It was my first concert experience. From that gig, Can I Play With Madness landed on A Real Live One (again neglected -together with other live albums from the nineties- in the current Vinyl series)!