I received a PM from "cryptforcause" (https://bitcointalk.org/index.php?action=profile;u=380298 ) inquiring to buy my account.

I have no reason to believe that impostor is using a genuine account in the first place.

That online store seems interesting : http://www.suryastore.com

The catalog of miners for sale is exhaustive, even discontinued models are listed, and stock does not seem to have a limit. They claim not to have a problem with stock. Well, that's a concern. because some of the makers a defunct, other do not have stock for sale themselves...

Also, that domain name was registered  on february 10th.
But reviews written inside (all of them 6 stars, only "excellent" etc), are dated before that.

Strange.

Has anybody bought anything from them so far ?

Antminer S2 has a set of large front inlet fans. These suck a bit of dust, and outside a datacenter (meaning, in your dusty home), they will accumulate lots of dust very soon if you don't filter the entering air flow.

Here is a cheap, easy and instant solution : you can use one of these kitchen disposable hood air filter papers :



This is a perfect type of paper for air filters : almost transparent, very light, does not put any noticeable additional drag on your fan, and these have a rubber band, like a shower cap.



Now, they also have the perfect size to just fit in half a second onto the front part of the S2. And presto, your front air entry is filtered !



And the paper is nearly transparent, which has the added bonus of not hiding the LEDs or the LCD screen !



Of course, don't forget to stick a small piece of filter paper onto the PSU inlet fan, on the right side, as well.
This way, your S2 will keep its inside free of dust and will make you a long use.
 

Often, Antminer S2 come with an LCD screen which is very bright and difficult to read because of lack of contrast.

Here is how to adjust the contrast :

First, gently peel off the front "Antminer" label covering the screen :



Then you'll notice three tiny holes around it. The hole in lower right position contains a very small pot, which you can adjust using a precision "+" screwdriver :



And that's it ! You know have the perfect quality picture you've always dreamed of !



All you have to do then is to put back the "antminer" label you gently peeled off at the beginning : it should be still sticky enough.

You can then go back to your regular occupation.
Easy...