I have visited maybe 30-40 while on vacations. I almost always find something I need. No high value items.
The charity shops are often FULL of ties.
My best finds. Again no high value items, but great stuff for my wardrobe:
Many made in England silk repp ties from unknown brands.
Harris Tweed coats, hats, ties, sport coats,....
Marks and Spencer made in England coats, sweaters, pants,... Some of the pants have a nice modern/slim fit.
Made in Europe cufflinks and tie clips.
Fred Perry and Ben Sherman shirts, sweaters, and pants.
Rare sizes: 38XL, 40XL, Medium+2(Medium Tall with longer sleeves),...