Sorry mate but i think you're gona struggle asking £150 (more than a year old, marked casing). I just got my second one off eBay for £156, 4 months old, very little use (the guy forgot to reset to factory, all call/data counters, texts etc. still on it), fully boxed with all accessories plus Otterbox Commuter case, receipt from Nokia shop for £349.99 in November (yep, he took a big hit, much to my advantage ) and as-new condition. You may do better if you lowered your price a tad, just a thought.
Good luck.