There is a company called ThredUp which allows women to send a bag of clothes and they'll sell what they can and pay you less than you could have made selling yourself but save you the time of having to hassle with all that. I think that's how it works at least. Does any such site exist for men?

not tried any but swap.com or the RealReal, the latter is for luxury items tho

crossroads trading buys certain brands /styles each season (in-store or by mail), but like RealReal they are selective.

crossroads trading buys certain brands /styles each season (in-store or by mail), but like RealReal they are selective.

https://crossroadstrading.com/buy-sell-trade-2/