You don’t need to be told about the basic reasons for choosing vital sign monitors. The first is to ask yourself what you need your equipment for and what to do with it. The second is to decide how much money you willing to part with to get it.
You know what you want to do because you know what you and your staff need. You know how much money you have, too, and looking for prices online will update you on what the cost looks like these days, and then you’ll know how much you’re really going to spend to acquire one.