The reason its now showing is because your using HTML to code it. this board uses PHP.
Just use [*IMG] The Image link [/*IMG] with out the *'s and it will post in your sig, or anywhere else on the board.
Also, with 3sgte's, I wouldnt buy any motor under $2000, you tend to "get what you pay for". By that I mean $1600 will usually mean a motor with some issues. Also it will be a Gen 2 motor and you dont want that either

I'm sure someone else on the board here has some up to date Gen 3 prices from companies that warranty their clips to give some degree of safety to the swap.