Here's an example, what I am wearing today.
First the jacket. I wanted a light coloured jacket that I could wear on cooler summer days really. I bought this one from eBay for £4 and decorated it with some cheap iron-on rose embroideries. The jacket has been brought up to date!
Next the jeans. I bought these from a local charity shop. They were brand new, and I think I paid about £5 for them. They fit perfectly except that they were a bit long. So I turned them up, double stitching the hems as they were originally.
The top is new and is from Lidl. I think it was about £6!
So whole outfit for £15. Bargain!