Default LG P760 Stock

Hello. I decided to buy note 2 and want to sell LG OPTIMUS L 9 P760 to cex store. However, my question is about going back to stock rom.

I have installed stock rom and unrooted the device. However, I can still go to bootloader and the version is artas version because i used his kitkat rom. So is it bad? Are they gonna notice that?

Thank you very much