High street. Not like Primark or even H&M (bought a cardigan from there like 2 years ago and the threads unravelled and virtually came apart after one wash, grr). Shops like Zara, Pull & Bear, Mango, Bershka (occasionally), Warehouse (used to, not so much now), Esprit, Uniqlo. I bought a jumper from Lyle & Scott last week but since I've only ever bought one item from there, I don't think I can really say I 'shop' there haha. Ultimately I want something that I like but that's also good quality. That's not to say that H&M and New Look and stuff are rubbish (as I've mentioned before, I've purchased items from these stores before) but I've found that since I've grown older, I've drifted away from New Look etc etc and more towards higher-end high street shops, if that makes sense. Also, shops like New Look and H&M tend to be overrun with 14 year olds...the ones I've frequented anyway.
Don't really know if I've answered your question haha, I've just babbled on..
I've never paid 100 pounds for a single piece of clothing, but I've bought pieces that are worth 100+...Ive just bought them in the sales!