There are some items which are just not possible to order online any more, assuming you want something of minimal quality. These include:
- chargers for mobile phones — all now fake as far as I can tell
- batteries for older mobile phones — second hand, dead, fake, or simply the wrong battery
- consumer cables, like USB to micro USB
- convection heaters — didn’t expect this, but I can’t find a reliable one (for the new office) online
That’s not counting the stuff where it’s still just about possible to get non-fake stuff, but it’s a crapshoot, eg. computer memory, hard disks, batteries, flash memory.