Eh the market for selling pages has been slow lately. I have 9k FB page, it still has the publishing rights, AND it grows almost 200 likes a day, and i havent been able to sell it. But good luck, sorry i didnt answer your question, i was giving you a heads up is all.
so the 414k page is yours? what is your page topic? built a site related to your page, and you can sell your site (include your facebook page) on flippa