Even if you add delivery, this still appears to be the cheapest ATI 4890 1Gb at the moment.
To get free delivery at Scan, visit this link, sign up to their forums and post away...http://www.avforums.com/forums/scan_offer.php
After you've registered and made some posts, you might need to visit that link again and follow instructions to activate free shipping at Scan.
The "Go to deal" link adds it straight to your basket at the £125.35 price, if you view the product page for it, the wrong price will be displayed.
Core speed: 850Mhz
Memory speed: 3900Mhz effective
Memory: 1Gb GDDR5
Tear through the latest games with seamless frame rates and go beyond HD with the power of the ATI Radeon HD 4890 graphics processing unit (GPU). Building on the strength of the ATI Radeon 4800 series award-winning architecture, this GPU stands out from the rest with massive graphics processing muscle. Take ultimate control over your game and crank it up with scalable performance. Go ahead, max out the settings and put the ATI Radeon HD 4890 through its paces.
Remember to remove 'Scansure' as its selected by default and will add £3.88 to the cost (assuming you don't want the insurance/cover/protection)