I’m looking forward to running a Shadow of the Weird Wizard game at some point.
Also working on a campaign of “no thank you evil” for my kids.

Because the person is demanding monetary compensation, not demanding one of the broken items. But also, he might be aiming to try to keep all 3 of them as a “compromise” as they might not be as broken as he is representing them to be.

I haven’t found a way to do so, natively but have seen a few people claiming that some Kbin phone apps will let you do so through the app itself.
Can’t remember which ones though, as I am primarily a desktop user.

they could keep one for themselves if they soldered the three of them for me.

According to this post, the payment was arranged to be if the soldering job was done. The post then goes on to say that not only did he not solder the parts, he damaged them so they cannot be soldered by anyone else.
The other person did not fulfill his part of the agreement, so he has no right to the compensation.

While that is true, the verbal contract stipulated non-monetary compensation on job completion. Job was never completed, so the contract was never fulfilled, and compensation is not owed. This is why repair depots have a minimum charge for technician time laid out in their pricing.