Yup, I've done this with a few machines...bought a used Pfaff 7570 after hearing how people loved them & I wanted the IDF. I never bonded with the machine, never used it, didn't like using it, and actually just sold it to a gentleman wanting to make things for his boat (apparently he had had a 7530 which finally gave out and wanted a similar machine). Also bought a used Viking serger 905. Loved it and thought I'd like the bells & whistles of the 910 and 936 so bought them as I came across them locally. Couldn't get used to them and sold them off and kept my 905. I want my machine to perform well when I want to use it and have a nice stitch. I don't want to have to fuss. I'm pretty happy with my current array of machines so don't think I'll be picking anything up in the near future.