Most "Spell Casters" do not work over the internet, and any real "spell caster" will not ask for money to do spells. As a spell caster, I personally believe if you want the best of results (if your goal is reasonable and within the realm of possible), you should do it yourself.
I'd say it's bunk to suggest that no real spell caster would charge for spells, it takes money to pay for components and time to work the spell itself after all. I'd even venture to suggest that most of the folks who do cast spells for clients charge for them. The problem is that the folks who sell spells but don't or can't cast them also charge.
The internet might not be the best place to look for someone though. See if you can find a group near you, someone there might be willing. Failing that, figure out what kind of spell you need/want and then do the research to cast it on your own.