[diffeomorphism]

Not really. Just have a look at ebay: Macbooks from 2015 are still expensive.

Partially because Apple's naming is useless, e.g. would you like to buy a macbook air or a macbook air or a macbook air? All very different machines from different years.

[vmception]

please, the market is efficient enough to know to ask for year and model, even which season of that year, for macbooks.