So I figured this out in looking at a deal on a iPhone.
The best outright deals on these phones are like ~5% off the RRP; but carriers are offering 0% monthly repayments on RRP, for 3 years.
If you try to adjust for 3 years' inflation, the carrier price almost universally wins. I do this in a crude way by looking at RBA's inflation calculator for the last available 18 months (10.5%) and applying that to the whole phone price.
This is especially true if you have (a) any sort of interest-bearing loan, or (b) enough cash to want to get a good rate from a bank; as the interest accrued from a decent bank account will likely make up the difference.
Thoughts? Have I got this right?
You will be stuck on an overpriced plan for the 3 years too