No calls will only be down to one thing IMO.. price
I was selling my girlfriends mini and the interest was fuck all no calls, nothing until we dropped the price then it was a whole different story non stop calls. The car market is pretty dead at the moment and there is so much choice esp in Focus's. We sold the mini only £300 above trade. Have you tried ebay? had move response from that then the trader. I'd start low eg £2995 with a reserve of £7500 the interest your get will hopefully sell it above reserve.
Good luck with the sale