Lorie Leininger print

I found this unusual piece at the thrift store today. It is by Lorie Leininger. I have found a little bit about her online, but have only seen a couple of other pieces by her and those are on paid auction sites. This piece depicts the unicorn from George Chapmans Bussy D’ Ambois. This piece is numbered 1/100 and is dated 1970. Are these pieces very collectible or was this only a hobby that she had in producing a couple pieces?