Fake ID UK

I've read all the OPSEC guides, spoke to a few other resellers on here, but I had a few questions.

1) What platform is best for advertising your IDs?

2) How can I convince people that I'm a legit ID seller?

3) How would I go about getting people to pay before receiving the IDs? Many people are sceptical about this.

I like instagram for advertising
As for legitimasy tell them so and so has gotten IDs from me and for your first person lettem pay after they receive then tell them to get a group together and you'll give them 20 quid also tell them to collect the money or in wilki's new option transfer the money to you