How much does an Omega Seamaster go for?

I recently purchased and Omega Seamaster, model number 2541.80. I'm looking to sell it in the near future. How much would such a watch go for?|||I once buy Rolex and Omega watches from http://www.buy-cheap-rolex-watches.com/ and http://www.cheaprolexshop.com/ they have many Omega watches,hope can help you.