A5 write off

Hi guys, 

I wrote off my 2011 A5 s line with 81000 miles, just wondering if anyone has idea how much I’d get, only just renewed insurance with Swinton in July and on my policy it says value is £10485 which I thought was quite high but there choice, just got a call from insurance provider as Swindon is a broker,,, I have been offered £7300, what’s your thoughts? Should I speak to Swindon and ask why they value it at the higher price and I only getting offered £3000 less

thanks guys