You should not give it to him. It should be

fixed easily. You might just pay under $10 for the part. 

The broken one could be worth more than $100 https://www.harborfreight.com/120v-spot-welder-61205.html

if you could make a spot welder. It is very easy to make. Just cut the secondary coil off, use a thick insulated  wire to make two turns on the transformer.

A spot welder is very useful machine. Check the one in my last link from youtube https://www.youtube.com/watch?v=eVNVNyoHxSM

for how to make a spot welder.