flohmarkt accessibility check

flohmarkt is "A decentral federated small advertisement platform", think classified ads like eBay used to be. midzer asked for help checking the accessibility. Although I am a professional accessibility consultant, this is not a paid for audit and I am not using all my usual tools (as I'm not at work!) so it's probable that I've missed things. I've also not looked at every facet of the service so…