I understand you want to help us to get a good deal and I really appreciate the effort.
However, in the Bitcoin world there are a lot of scammers. Since this shop is just very new, it's nearly impossible to tell if it is a scammer or not.
We, as forum users and potential buyers, just want to know wether this site can be trusted. That's why we, or at least I am, try to confirm it.

This, No.
Yes, we are sure.
And yeah, Everyone that says something believes in what they say and says they are honest.

ASIC's cannot be reprogrammed. They are pure hardware that are designed to do task X. In the case of Bitcoin and some other alt-coins that would be SHA256 hashing.
There's no software inside those things, so there is nothing to reprogram so there's also no way to increase performance with software.
However, you can modify the hardware. Specifically the clock crystal. Stock it should be 10 or 12Mhz, but there are people upgrading the clock crystal to a 16Mhz one and increase the input voltage of the ASIC by swapping some other components out. This does require external power, since a USB port will not be able to provide that amount of power, and ofcourse, more power in means more heat out so it will need better cooling.

Just think of these things as hammers. They can only be used to hit things. They cannot cut, since they are not a knife. And there is no way to turn a hammer into a knife by just reprogramming it.
That's more like it, however, still no forum name written on
Please, just put the phone on a table, put the shipping label next to it and write your forumname on the shippinglabel. Then take a photo of it and post it.
Handwriting is extremely hard to photoshop and having some textured surroundings and light influence makes it even harder. That's why that would be considered good proof.