I did my mum a favor and sold her d5200 on ebay, checked it all over apart from the sensor. Person that bought it is now claiming that there are a couple of dust spots on the sensor itself (i didn't check the sensor physically).
Told him that i've got a blower which has cleared any dust spots i've had previous and willing to cover the cost of him buying one to clear them.
He's stating these 'look' more like obstinate spots... and would try it with a lens to see if they appear on the final image. Stated he did have a blower but hasn't tried it yet... If so would prefer for a professional clean...
How much are professional sensor clean?
Could really not do with this hassle with the run up to Christmas