Many Australian’s now use Gumtree as a means to get rid of items cluttering around our homes or to get cash to go buy the next upgrade.
Once you post an item for sale you will attract the attention of scammers.
Gumtree has a list of scams to avoid on their site.
If it sounds to be good to be true it will be a scam.
As like any other scammers , stop. Do not reply and Report them.
If you have given access to your computer to an unknown entity. STOP. Disconnect and call Techbug 1300 655 121.