Comparison is a bit flawed in a number of ways though:
- you can't compare with separate devices
- you need to price at the margin (marginal cost)
- you need to consider timing as well as opportunity costs

I'm not trying to imply anyone's decision is bad - it might've been the best after all.
I'm just pointing out flaws in reasoning, which isn't exactly something I'd expect (or even recommend) everyone to do before each purchase anyway (I don't deny splurging myself).