Maybe someone who works with Youtube can correct me, but I think it's not good idea to post Youtube account that you're selling in public. Sales of Youtube accounts goes against their ToS and you're risking to lose monetization.
I also thought this in the first place that if anyone reports this channel and this post as a proof, i think the channel can be demonetized but then there is no proof that this channel belong to the OP. We need to proof that the OP is the real owner of the channel who posted a selling monetized account.