That seller is a muppet, I bought mine from him, as did vinceroger on this site.
They all came unprogrammed and without component schematic.
First the seller sent me a link to the "correct" firmware: which was the wrong bloody firmware (a model with a completely different LCD so no display with it).
The seller even sent me a new Atmega, and guess what: Neither it was not programmed!
The good news is after programming with the firmware that stj posted a while back it works great!
I'm going to try the instructions as soon as the 22pF caps I ordered arrive!
I didn't have any in stock so I guess I'm going to have to wait.
I've just ordered them so it's going to take some time.
I've already sent a message to the seller about the issue ;I also asked for a refund or a ready built unit(without accessories etc)
I don't feel well asking for a refund and I avoid it if I can but since I haven't got what the listing stated (a working transistor tester) I think I am eligible for it.
My job was only to solder a bunch of components,not trying to guess what's wrong with or programming the friggin atmega!
I thought that proposing him to send me just the atmega was risky and here you are actually confirming my thoughts!
Funny thing is that yesterday I bought a dds function generator
KIT from the same seller!
His/Hers feedback is very good; I didn't know better..
I'll let you guys know what happens.