What are you wanting to use it for? To look smaller? Or to stay warm and for support in sports?
I have two Under Armour shirts that I love. I bought the first at TK Maxx (TJ Maxx in the US) and absolutely ruined it at rugby - that's some mud that ain't ever washing out. I was back at TK Maxx and they had the same shirt at half the price I paid, so I bought it. One I use for rugby and the other for running or wearing around.
Check out your discount fashion store...you never know. And sporting goods stores.
Lose 25lbs by 15 April (10 Mar)
Get to 100 kg (220) by 1 May (7 Apr)
Be 205 by race day - 14 July
One-derland by 1 Sept