Your problem: You can only send one PM every 3 hours.
Your solutions:
1. Buy Sponsor.
2. PM in Chat.
3. Make a thread in the spam section?
4. Post on your marketing thread that you're speaking to X on Skype.
Why all of these work:
1. It's Sponsor.
2. PM's are put into a log, so if a dispute is opened, staff can check that for evidence. You can put the link of a screen shot in that just as easily as you can in a PM.
3. You're Verified, so spamming is your specialty.
4. This is probably the most professional way of doing it, even though it would cause a spam in your thread. I realize you can't privately do screen shots of the skype convo always (some people don't want their skype names leaked), but if you can quote what they're saying, it should work out.
example of that: Verified: "k lets do this fgt" User: "Okay, can you post on thread pls?"
Verified: "What do you want me to say?" User: "Say 'Speaking to *anonuser* currently, code word: bilgatetters'" Now you go post: 'Speaking to *anonuser* currently, code word: bilgatetters'
He gets his confirmation, you get your sale.