Can't reply to a PM

I am a new member and I realise there are rules about minimum number of posts, but I have been sent a PM regarding a potential sale and I'd quite like to be able to reply to it. Or at least be able to contact the person by some other means. Please advise asap.
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momentarily from the herd and thinks for himself.
Reply in the sale post to the person who sent you a PM, advice them you are new member and cant respond to their message and ask them to email you directly and you can then reply.