None of this is needed when starting. You can begin completely free.
Scanner: Eyoyo Bluetooth Scanner
Scanning App: Scoutly
Listing Software: Turbolister
Repricer App: RepriceIt
This all makes the day go faster, but it’s not required. Once you begin to scale up, you can grab a scanner to go faster and once you start taking in a ton of inventory, grab a listing software and pricing tool.