A couple reactions to your comments:

1. You’d be quite surprised by how many of our subscribers do in fact sell iPhones and related accessories! It’s obviously not the easiest market to break into, but Terapeak has a very wide range of sellers amongst its subscriber base.

2. iPhones (and iPods) are indeed an example we use more often than others when discussing trends and sales patterns, as we feel it’s a visible market whose values can be seen and understood better than more obscure items and categories. With blog posts like this one, we’re not necessarily encouraging all of our readers to go out and source iPhones — as, like you said, that would be quite unrealistic — but rather to observe the effects of product launches and price modifications, and to better foresee similar patterns within their own specialized markets.

Hope that helps you understand things a bit better!

Hal