Ultimate Gangsters Box Set (2011 Edition with Scarface) ~AUD $22/$24 @ Amazon UK/Zavvi
I posted the last deal in regards to this box set, but it's come down in price again, and available via two different stores depending on your shipping needs.
At Amazon UK, it's $22.32 (after removing VAT, at the last checkout page, and doing currency conversion in Google), but you'll have to get something else to get over the £25 free shipping limit.
At Zavvi, it's $24.43 with delivery included (£0.99 per order).
This is the 2011 updated version, which now includes Scarface, as well as American Gangster, Carlito's Way, Casino, Public Enemies. Not strictly the "ultimate" gangster collection, but it's still 5 pretty good movies (in my opinion, 2 very good ones, 2 great ones, and the not too bad Public Enemies).