Rules for posting.

Reporting of scammers can be tricky.

Before you even start a trade, ask a GM(if there is any online) to watch your trade by using the command @gm and type out what do you want from us.
If there is no GM online, you can have a friend to watch by. But this is not a recommended method because you still have no proof.
SS can be helpful but it can also be useless.

The better way to NOT get scammed is by recording the video.
You can record a video by downloading Bandicam

http://www.bandicam.com/
Link^

Using of BandiCam is fast and easy.
After downloading Bandicam, open it up.
Once opening, click on the Video tab.
Check the HotKey, for me is F13 to record.
Then once you are done, get back on InkedMS.
You should be able to see Green Numbers at the top left of your screen.
Once you press F13(or whatever your hotkey is set as) it should turn red and it should start recording.
Once the trade is finished stop recording by pressing the same key you recorded.
Now go to the folder that you have saved the video in.
Upload the video in youtube. If you don't have a YouTube account ask someone else or a friend to upload it for you.
Once done post it here.
It is the perfect evidence/proof.