I found a glitch in which if you close the tab you’re playing in while in the beginning tutorial (with a new character of course), you restart the tutorial when you go back to that character and enter floor one. You can pick another item and effectively repeat this glitch to rack up starting items, which sell for a decent amount. In the later floors, this doesn’t really matter as you get substantial gold from enemies, but it can be exploited by new characters to rack up money for gear.
You don’t get another Leather Cuirass from Seraphine though, as it locks your inventory.