That's what happens...
I just went in and counted mine, wasn't sure of how many. The oldest is a model C, the newest is an Ultimate G..grand total 21. That's too many! Older than the C is a Scott & Fetzer but has the earliest Kirby bag and the brushroll is moved by the wheels. There's a Super Vac but I count it as a Kirby because even though they deny they know anything about it, was made by them. I think I'm good on Kirbys! It's easy getting out of control..