Save your money.
If your son is serious about playing college baseball...then take it seriously and put in the work. All of the answers to the process are here. Spend the time reading through the recruiting threads, and make a plan that fits your son's academic, family financial, and athletic profile. A recruiting service can not effectively do this for your family IMO. It IS a hell of a lot of work going through all of the college books and finding an academic and financial match, as well as athletic, and if you are not willing to put in the work then your son is not ready to play college ball as it is much harder than he can even imagine as a HS player. Being part of the process for your son will be an eye opening experience and bring you closer as a family and help you make a good choice, because even the ones who start playing in college will drop it by the time they are Sr's, and more than 50% will transfer.
Read Peah's, Prepter's and RJM's posts carefully.
Looking back on it the only thing I would have changed is to get my son into the weight room sooner in HS. Get bigger stronger faster to help him stand out and also focus on skill development. Once there is something that might be of interest to a college find programs that match his skills and let them know of his interest in their program.
Make a plan, and work the plan. If you and your son are not willing to put in the upfront work then he is not ready to take the huge commitment of playing at the next level.
JMO.