Avoid Pre-orders or Pre-sales. It makes you pay upfront and the expected date is dubious.
You’re much better of waiting for the moment that the item is actually in stock and order then.
By that time, the chance is that price will go down anyway. Remember the rule for chinese shopping: prices never go up, only down.
If you want to order a Mi Pad 2 that is actually in stock and you want to reveive it within a week, go with Vickmall.com and use DHL.
Always ask if an item is really in stock for each vendor you buy from, it saves you a lot of hassle. Ps: just checked, Vickmall has the Mi Pad 2 in stock, but just send them an e-mail to ask to confirm.
I ordered my Redmi Note 2 Prime from them and got it in less than 5 days from ordering and using DHL. They don’t have the big assortment of products like Gearbest, but they seem much more trustworthy.
Avoid gearbest if you can, they are not to be trusted and take you for a fool. Does “Just give it another 2-3 days” response ring a bell?