Yes Kickstart 1.2 or 1.3. I bought my Amiga 500 for nostalgia. I used to have one in 90s.
I could consider an Amiga 1200 with a harddisk but I have got lazy and I do not want to go through all that hassle installing WHDLoad and games and tuning Workbench wallpapers.
We are many here who could give you a VHD/VHF of a fresh install of Workbench with the complete WHDLoad pack installed with games if you would want, then you just have to write it to a CF and you are set (takes a few mins only and it's easy)
Since me and my wife recently bought a new house we was lucky enough to find one with 1000/1000Mb/s optic fiber Connection recently installed so sharing files from my fileserver is a breeze so it would not be any problems for me to share such files to Amiga users
Edit: I Think much of the Amiga OS 3.x confusion is because the box said Amiga OS 3.x but many people only still have/had the floppies that say Workbench, I myself bought Amiga OS 3.1 used without a box back in the day and the floppies have no "Amiga OS" text on them, here is a Picture of one revision floppy, I Think mine looked something like this (I don't have em still tho):
