webuyanycar and wewantanycar are actually buyers for BCA and Manheim auctions so the prices offered depend on what the relevant makes and models are fetching at auction. If they don't want a car they simply make a derisory offer. If they do want it and if it is a model that is selling well, the vendor might be pleasantly surprised. Unfortunately I don't think a 2008 Cee'd 1.6 petrol fits that category. Your best option for the best money is to try to sell privately, don't let anyone take a test drive without proving they are insured to do so, and take payment from them in a bank where it can be deposited as cash into your account.