hi.i have been quoated £2258 to replace my old boiler with a worcester bosch boiler 30si.i will get a free 10 years parts and labour guaratee as long as i have it serviced every year( 79.99 ) plus on the third year have system flushed (199.00 ).does this price seem about right?.the company have been going for years-they put our glowworm boiler in 18 years ago.i lve in nottingham.