When I sell parts to others I always say look if you have a problem bring them back I’m not going to keep their money if its not what they want or they find problems. I also keep track of how things are working for the buyer a week or so after buying. But yeah I been in this position a few times. Like when I bought my 240…
Yeah it comes down to the buyer and seller but there is only so much the buyer can know with out owning the parts or cars them self’s.
I have no doubts Sherlock was in the exact same predicament.