Please feel free to add your shop to this list, or the ones you know are active (so have a fairly active owner who refills his/hes shop(s) at least sometimes).
My shop (Therka City, near @Jeffrotheswell s portal hub), compact peat, glass and all kinds of bricks for 15c and lantern for 30c (cause I specced to shovel I can make them easily thats why they are cheap), and now refined silver for 400c and refined gold for 500c
@Xamora s shop (Therka City, near @Jeffrotheswell s portal hub). I know him irl, and he wanted to post this for him, he usually sells tools and gleam, with variable prices.
And two other shops which ones have their own topic: