Contact here on soundcloud inbox and 
e mail: masteringservices@outlook.com

Typical mastering of a track is 20euros ( around 22.63 US dollars )
For other stuff, like mixing and mastering track we will agree private.
U have examples of my work, so we do not return your money back if you are not satisfied.
Deal is that U send us your track for mastering in WAV format on -3 od -6 db of headroom. We will provide you shot teaser to hear results.
And one more thing ! We do quality not loudness ! 

All the best boys and girls  ! 

Mastering Services