I get mine tested annually at Penn State and it is $9 plus postage to mail it there.
Results showed that all of my nutrients were high so no need to add anything except some side dressing of nitrogen. I find soil testing to be very worthwhile but it is better to have it tested near where you live because the specifications that they use are developed by crop testing in your state. TX soil is different than PA soil so naturally expectations would be different.
The time it takes for the test to be processed depends on how busy they are at the lab. I had results in early spring in less than a week but it will take longer if they have 100 samples to test at the same time.
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