how to make a deal?

Refer to each of their announcement ^[ANN] threads ^{[every single one of the escrow providers, have a slightly different way of handling stuff]}.

I write to people from the topic list and no one answers.

Not sure who you contacted from that list, but apart from a few, most of them are no longer active ^{[outdated list]}.

How do I make a deposit

Wait for their instructions and watch out for impostors ^{[you might receive a PM from them]}!