Work Robes:

Plain (28 Sickles) Buy It!
Patterns (30 Sickles) Buy It!

Pointed Hats:

Plain (15 Sickles) Buy It!
Patterns (18 Sickles) Buy It!

Winter Cloak:

Black fastenings (45 Sickles) Buy It!
Silver fastenings (45 Sickles) Buy It!

Dress Robes:

Plain (35 Sickles) Buy It!
With Lace (40 Sickles) Buy It!

Special:

Invisibility Cloak (1 Galleon) Buy It!