Location of start relay. I've been told the start relay is going bad on my 16 yr. old Kenmore

Question

I've been told the start relay is going bad on my 16 yr. old Kenmore ColdSpot 20 with freezer on top. Model #106.9710680. I want to replace it myself, where do I find it under the frig and what does it look like? I assume its connected to the compressor. Sears sells them for $36.50 is that a fair price?