Cutterboy, that's because Dynam isn't officially sold in Europe (at least not UK, FR, NL, DE), it's called Protech here. I have to deal with the same price-differences, blades here (Graupner, same mould and factory!) are €20, which comes down to $29 or £14. And i didn't have good experience (even 11 weeks transittime) with overseas ordering until i found USHobbySupply!
Fact still is, that Extreme (so with the E) is still overpriced for most of us and just repackaged stuff. Furthermore is their information incorrect and sometimes a plain lie. I'd go for Xtreme with my eyes closed and no second thoughts.
About the Spektrum kit that comes with the CX2 (RX&TX), they are cheaper from E-flite then from Spektrum from what i've seen/found.
Not to offend you in any way, just to shed my light over/on this discussion or how you call it 'rant'

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