They are sooooooooo expensive now! I got First Love and Distance around the same time for about $100 each. First Love was the most expensive, but I had the expendable income at the time. No Regrets.
This waasss...around 2005-2006 I think. Right after Exodus promos I went on a rampage to get it all.
The only thing I'm missing from my Hikki collection is the First Love 3cm single. Still haven't managed that for some reason.