Cheap blank 8.5gb dvd disks in the UK

Does anyone know of a shop in the UK(preferrably London) that sells them cheap? Best I've found is £18 for 5.
Don't want to buy online cos postage costs defeat the object.

http://cgi.ebay.co.uk/10-Dual-Layer-...QQcmdZViewItem

search for 8.5gb on ebay and can get about 10 for £19 delivered, and if you buy more it may be even cheaper

http://www.disccity.co.uk/acatalog/Dual_Layer.html

About £19 for 10 spooled, shipping about £2.35.
About £1.95 each jewel cased, shipping about £3.20 for 5.

Thanks to both of you, looks like I might have to get them online but I ain't going near ebay.:)

Bought 100 4.7gb DVD-Rs at Best Buy for $15.99.

KILLER DEAL W00t w00t!

i remember seeing some dvd9s on ebuyer for about £11 for 50 or 25 cant remember.

( www.ebuyer.co.uk )

edit:
nevermind they were normal dvds just with 16x :P

Click here -> Ridisc (2.4x) Double Layer DVD+R
10 disks for £15.49
postage 99p!!!