Jeans

I normally hunt around on Amazon all the time, if I need them or not. If you willing to play the waiting game and check literally everyday (it's a habit now) you can pickup some bargains when the stock is low in a size. For example I'm awaiting a pair of Boss jeans tomorrow for £18.13. My last few have been Pepe,Wrangler, Tommy Hilfiger all sub £20 (same for chinos and trousers for work).

Lots of interesting answers to come - largely dependent on vanity and age. I wait for offers (must be below £10) and buy. I'm old, therefore I have no idea what your talking about with design cross/stitch etc

Japanese selvedge denim is where it's at. It's pricey but IMO worth it. Check out Jeanstore.co.uk and filter by Made in Japan or using Japanese denim. Not sure what you mean about the stripe cross design. (edited)