Buying secondhand well is a skill. Check seams before prints, feel the weight of the fabric, and always try the charity-shop sit test on tailoring. Our graders reject around six in ten pieces, so what reaches the rail has already passed the hard part.
Bring this checklist next time you visit: seams, fabric weight, labels, hardware, and the sniff test on vintage knits. Your wardrobe (and wallet) will thank you.