It would appear you gave me the wrong egg; this one has a shiny value of 2307. Here's a screenshot of the one you sent: http://i.imgur.com/UMm2FM1.png I'll go ahead and give you this one back and give you a chance to find the correct egg. :)
I think the trade is pretty fair as is. If you'd prefer to not go through with it without a credit, I understand completely. If you'd still like the Manaphy, send me a PM on Pokécheck or a VM here and I should be able to trade at that time.