I suggest waiting until the middle months of the next year for buying Libra. If someone has a cheap offer for Libra coin, that guy is scammer, be careful, don't be a next victim of the scam. It is not a good idea to buy the coin which has the same features of stale coins without any expected market volatility.
Must wait for the official announcement from Facebook for their sales announcement. and if there is a party to offer. obviously it's a scammer. so you really have to be careful in investing