Ok...
While I see the attraction in saving $10, I agree with the guy who said, "So you risk a £400 device for a saving of £10 on a cable."
Apple most likely gets a greater profit, but it also gives you, almost certainly, a higher quality product. If you want to support "the cheapest crap we can ship while still passing the test for a week or two," feel free.
I've always felt it better to spend a bit more for something that's likely to last ten or more years.
I have my original iPods -- all of them as I upgraded -- I have an original clamshell iBook that's still in daily use (kids!), ... I could go on. Apple generally has high quality standards. Not always but in those cases they usually stand behind them. That's worth a bit of extra payout now. My time and stress level are worth more than $10.
Oh, and I DO remember SCSI cables. Only a fool would skimp on those. A good cable would save you endless troubleshooting.