Very good questions. I gather that there are those who collect only. I like to shoot mine albeit I have only recently rediscovered my interest in air rifles, probably for nostalgic reasons. I am therefore beginning to build a modest collection, which I do not want to become too large because it will not then be possible to shoot each item within the collection. The problem is that the collecting habit can become rather addictive and produce a momentum of its own.
I find shooting air rifles to be a summer hobby; I do not care for shooting indoors but winter is not much fun either.
I also find it interesting and stimulating to meet other enthusiasts and I have found that this site has done much to increase my enthusiasm whilst also considerably raising my knowledge. That said, I am a technophobe and would not usually consider dismantling a rifle. Happily, Protek is not too far away and they are competent airgunsmiths.
Personally, I would not purchase an air rifle if I did not intend to use it.