Typically, the issuing locality (city, township or county) will charge a bit for Birth and Death Records. See
here for how and where to get the ones you want. Don't pay vitalrec for them...just call the location where you wish, and confirm with them what their charge is and for what years they have the records available.
Also, see
here for some other search tips.
Chances are, there are others researching the same people you are...so finding their research...and what records they have found...is a great start.
95% of all I've found (
12000 names in my database now) was found by free sources.