... from somebody with a low post count directing you to a third party who has one of whatever you are looking for for sale? If so, it is most certainly a scam. The most recent one came from "burger joe". He has been banned.
If you receive such a solicitation... Do not respond to it. Please take a moment and report the PM to the staff and make sure that you let us know the user name!
Unfortunately, these scammers are very determined and we have banned dozens of incarnations. It may or may not be just one person, but it is happening here and on other boards. Be alert, be aware and do not fall victim.