Wow.
1: if the seller makes the skimmer, and the parts can by your definition be repaired, that doesn't mean he can sell it again.
Would you have been happy to receive a clearly glued back together acrylic part on your skimmer? No. So he can't sell it.
2: MAYBE at best, the seller finds the time to repair it, sells it as used or damaged, or gives it away. That isn't just 5 minutes of their time, as a manufacturer it is a huge hassle and basically half a days work to deal with something out of the ordinary like that. He's still not gaining from it...
Let's say you paid $100 and it cost him $50 to make. It arrives broken and he has to spend at LEAST a few hours keeping track of emailing you back and forth, dealing with shipping insurance (far more work than you realize) deal with making you a new one or taking one out of stock that may have gone to a second order, now he's out $50 for the second skimmer, plus the time involved.
You've paid $100 and understandably been put out by maybe a couple of days, **** happens. I would bet that if you weren't arguing it would have been much less of a wait.
He is now out $50 worth of stock/materials and you still get your skimmer for the same price you always paid PLUS you want to keep an entire second unit that you could sell, repair and sell, or use for spare parts?
End of the day, the dude isn't making money here.
You want two skimmers because you're annoyed that the first one broke and the seller should have to suffer for that?
Dude, get real. Send it back, stop being petty and be glad he made an effort to make it right.
Apart from the following facts...
- it may not be repairable
- The shipper may not pay insurance at all or for several months
- you've wasted a significant amount of their time too. Your time is only an annoyance, their time spent dealing with you is literally pulling money out of their pocket.
- you still get your skimmer for the same price at the end of the day, you're in no way entitled to keep two.
- if you went to a store, told them your item was broken, and only had photos of it, they wouldn't give you a refund. Just because a shipper is the middle man, this isn't any different.