What the hell is going on with shops?

...There was no written estimate, as he just asked if they would change it and they told him they would do it for that price.
Very likely just trying to get him to go away, since he already had his own parts.
And there you have it! :cheers: That's what the hell is going on with shops!
Sad to say it but your nephew may just have been the victim of the shops frustration with so many people before him. Unfortunate for him, I'm sure he's a good guy. But the shop owner probably thought it was another potential headache & blew him off. Not really trying to rip anybody off. It would have been better to say "We rather not install anybody's parts but our own." & then give an actual estimate.