The SE 1/20 is very common. These were typically marked "1MB RAM, 20MB hard drive" or something of the like on the back. I would put up a picture for you, but I no longer have any with these words on them--all three SEs I have feature the 1988 copyright label, which eliminated those words (the same year the Macintosh Plus label dropped the "1MB").

I'm going to add the Performa 200, 250, and 275 to the list (Classic II, Color Classic, and CC2).