Britain's oldest eBay seller was celebrating yesterday after racking up 100,000 sales - at the ripe old age of 79. Sprightly Geoff Rosenbloom, a former RAF pilot, turns over almost £100,000 a year selling mobile phone accessories, electronics and work wear. While most pensioners would have retired 15 years ago, Geoffrey is EXPANDING and moving to bigger premises in Paisley, Renfrewshire. The grandfather-of-two said his business started in 2004 as a hobby making 'pocket money', but it became so busy he had to buy a new HOUSE for all his stock - and hire two members of staff.