I think the "WW1 EK and "stuff"" is probably the biggest and most interersting collecting field there is.
1) The variations of the cross itself are waaaay nore then the WW2 kind... and the fine features make then so much nicer
but more than that
2) The huuuge variety of WW1 Documents, print variations, associated paper work... leaves WW2 in the dust
and not to forget
3) All the "Stuff"... for some reason it never took off in WW2... coffee cups, beer mugs, postcards, banners, bunting, jewellery, cigarette cases, ..... there is an endless array of "stuff" that is EK related.
If you cannot afford to collect EK1s, then there are postcards... or EKs on copper driving band broches...
There is "something for everyone" in the field...
What is YOUR main EK interest?