To Buy Or Not To Buy?

Is it still a money saving exercise to buy a coat for £20 when it is reduced from £45? The dangers of window shopping when you know you are going to be paid soon.
To think sensibly my mum would say it's not practical (no collar) and my dad would probably say I already own a coat (true, but I did see a granny wearing one the same which damaged it's style rating!) So really I only want to hear from you if you are going to encourage me to buy it!
If you are remotely interested this it it but in blue, the rules of shopping used to state I had to wait four days before buying something so I guess now I'm on super save I should at least double it! Meanwhile I'll hide all the coats in my size around the shop to waylay anyone else from buying them!