Got this brochure in my mail. Seems like a decent price. Large variety. Shirts can be customized.
Haven't ordered yet though.
http://www.ctshirts.com.au/FAQ?faq=alex
About shirts for only $39.50 Plus Free Delivery:
The shirts for $39.50 offer applies to Charles Tyrwhitt’s business or casual shirts originally priced at $140 and $160 and piqué polos originally priced at $110 and $120. Offer is limited to 5 shirts per household. Woven tie offer price is $39.50, original price $100. Handmade tie offer price is $59, original price $170. The free delivery offer applies to one single order and applies to standard delivery to an Australian address only. The offer end date is Sunday 30th March 2014. Offer is not valid in conjunction with any other offers or vouchers, or on website clearance section. We reserve the right to withdraw, amend or extend this offer at any time, without prior notice.
Free returns:
We want you to love our products as much as we do, and believe you can’t buy better. We’re so confident of this, we offer a full six-month guarantee – no matter what condition the item’s in. However, if you do need to return your item(s) for any reason, this is free from Australia. Use the returns label found in your Charles Tyrwhitt package and post the item(s) back to the specified address.
as per http://www.ctshirts.com.au/FAQ?faq=alex there are also other multi-buy offers such as 2-for-$160 luxury shirts but note that more can be found even cheaper via https://www.ozbargain.com.au/node/115459#comment-1578366 :)