Of course, I was looking for the serial number of the monitor.
 It is 5221075.
 Maybe all A2024 serial numbers start with 52xxxxx and this must be the
 reason why two guys came SO close!
  
 Received numbers:		       Difference:

 1230506  from	Jonas Larsson		3990569
 2711498  from  Oliver A. Hofmann	2509577
 7448518  from	Bartosz Boruta		2227443
 3300000  from	Jan Sindlar 		1921075
 3482731  from  Charles Barker		1738344
 3616157  from	Stefan Litbo		1604918
 3695472  from	Bartosz Boruta		1525693
 6666666  from	Michael A. Krehan	1445591
 6581564  from  Bartosz Boruta		1360489
 6050321  from	Timo Kaikumaa      	 829246
 4628686  from  Oliver A. Hofmann	 592389
 5062980  from	Konrad Dubiel		 158095
 5212716  from	Bartosz Boruta		   8359
 5220000  from	Miloslaw Smyk		   1075

 So the lucky winner of the A2024 monitor is:

 Miloslaw Smyk			
 ul. Orawska 22/34	Email: smykm@felix.univ.szczecin.pl
 70-131 Szczecin 
 Poland
 tel. +48-(0)91-825283

 I have already contacted him.

 If you are still interested in the  puzzle solution,  then...