Lift your head.

One of the objects I've come across in my current gig is an iPhone that's old enough to have a home button and headphone jack.

Frankly, if my clients don't want to hang onto it, I may well ask for it myself - the old number's disconnected, but swapping in another SIM card shouldn't be a problem. I'm happy with the model I have, and I know people who've said how much they wished they still had a phone with a button.