Anyone here experienced with mastering?

[Barnelby]

Ok.

I'm at this point where I feel like my skills have kinda plateaued when it comes to closing the margin between my sound and the "pro" sound. I'd say I'm about 60-75% where I want to be... problem is, I don't know enough about mastering to know how much of a difference it is going to make... is it going to be the final 40 or so percent of the sound? I have no idea because I've never heard a side-by-side of something that is mastered and unmastered.

So I'm wondering if anyone out there would be willing to take say a 15 second clip of one of my songs and do some black magic on it and give me an idea of what kind of effect mastering has.

I know it takes time, so I am willing to throw in a few bucks if necessary...

Any takers?

Thanks!