I didn’t know that (y)
You can buy a used SE for this price
iPhone 5S runs the latest iOS so for now at least, all apps should work on it.
No point buying to old no apps will work on it ?
I don’t trust Argos eBay refurbs anymore. Recently bought a pair of refurb joycons...3 straps and 1 joycon arrived. Also about to send back a refurb Switch which doesn’t work when in docked mode. USB port appears grimey (and not in a mid-2000’s drum’n’bass way).