BIC Velleda 72 Pack Whiteboard Marker Fine 1.6mm Acrylic Bullet Nib $22.50 + Delivery ($0 with Prime / $39 Spend) @ Amazon AU

Very good price on fine acrylic nib whiteboard markers. These are listed as either 1.5mm or 1.6mm depending on where you look. I have added Officeworks description as it has more detail than amazon. Same markers are $59.81 from Officeworks

Description from Officeworks

These BIC Velleda 1721 Whiteboard Markers provide high control and allow for a more precise application. They are ideal for classrooms or home and the ink can easily be wiped away seconds or days after use using a cloth or eraser.

• Each marker has a fine, bullet-point tip with a 1.6 mm nib.
• It's ideal for use on whiteboards at home or in the classroom.
• The ink is low-odour and can easily be erased using an eraser or cloth.
• The thin, round barrel is easy to use for children.
• They each have a strong, acrylic tip that won't bend or break under pressure.
• There are 8 vibrant ink colours in assorted quantities: 12 x black, 12 x light blue, 12 x red, 12 x green, 6 x blue, 6 x orange, 6 x purple, and 6 x brown.
• There are 72 markers in this pack.