By Dave Snelling Now could be a good time to invest in a Galaxy S23 with Amazon launching a swathe of money-saving discounts on these popular devices. The sale, which has just gone live, includes savings on the Plus model along with the more premium S23 Ultra which features an impressive quad rear camera, a huge 6.8-inch screen and a nifty S Pen which is tucked inside. This in-built accessory lets you scribble on the screen without using your finger and also offers instant note-taking which can then be turned into editable text. At launch, the S23 Ultra would have set you back over £1,240 but …