Don't understand the rage
The Watch isn't a bargain-bin article to begin with.
So, it makes sense to price the charging dock accordingly.
Everybody does this.
It's probably as overpriced as e.g. any car beyond the sophistication-level of a Dacia Logan.
People spend insane amounts of money on car- (and motorbike) related purchases (and taxes, insurance) - and if you ask them, why they bought an Audi, a BMW or a Lexus or whatever they'll say something along the lines of "It's nicer".
Do you guys go to car-forums and flame the Mercedes and BMW owners (who, more often than not, haven't even bought the cars, but are leasing or financing them...) over their taste and their (assumed) lack of taste?