Tess-Array has the biggest and best range and best prices of 15mmx15mm tiles!!!
16 sheets of VGT fit in a medium box for about $12.15 postage, some capitals and rural areas may be slightly higher.... but great value!!
Don't worry if the shipping app calculates a higher price for you or a different method, I'll package your order and send by the cheapest method to you, and I will refund you any extra you may have paid.
You only pay what Aust Post charges me.