I haven't seen it before either, but this clearly took a lot of work and it seems like a reasonable price. I don't mind paying $10-15 for something I'll be star

I haven't seen it before either, but this clearly took a lot of work and it seems like a reasonable price. I don't mind paying $10-15 for something I'll be staring at every day for possibly years. I really like it, nice work. The Filter Machine theme is my favorite.