Firstly the fact that you tried to buy a loom point for 100k and thought it was legit is funny.
Second, you trusted a random person on the internet.
Third, keep deals like this over private message on forums or the website so you can save/screenshot for evidence.
Fourth, you need to be more careful and just from the way he typed I woulda bailed on the deal even though I'd never believe 100k to start with. You even OFFERED him 175k then he lowers the price (who the fuck would not want more money)?
Your own fault - but hey that's just me.
There are many honest merchants out there, that know reliable heirloom point sellers. Ask around when someone offers you a loom point. If it is someone you see frequently on the forums, you are also sure not to be scammed.
This ^