In my opinion I don't think you can!
This whole outfit was an absolute steal!
Shoes - £13 (bespoke) Charity Shop
Jeans - £20 H&M
Coat - £50 (Barbour) E-bay
Jacket - £22 Topman
Waistcoat - £25 River Island
Tie - £1 - Charity Shop
Shirt £25 - Next
Absolute bargins, charity shops and e-bay are total goldmines!