I have a bought a refurbished iMac, the computer w...

I have a bought a refurbished iMac, the computer works really well, 2013 model. It quickly updated to High Sierra and has sync'd beautifully with everything. Quick delivery interstate. Only disappointment was that the computer was FILTHY DIRTY. Black, greasy finger prints everywhere, the screen, the back of it and the box. I assume after it was refurbished it was not cleaned and probably not cleaned after it's last use pre refurbishment...kind of gross. It only took me 10 minutes which I think they could of afforded to do... I had assumed that a refurbishment would mean they tidied up it's exterior as well, the price was only $500 short of a new low model version too so we paid good money and had higher expectations. Mouse, cords and keyboard are all clean and tidy however...
But at least the computer works hey. Thanks guys!