I cannot agree. Firstly as I already mentioned it still can be found here.
Secondly I just took a look at ebay.com sold items and there I can find sets sold this month for 205$, 230$ (okay that one is from britain I see...), 180$, 170$
(older ones have been cheaper that's true).
So if you bought it for retail 130$ and sell it for about 200$ (that's the price I see for the time around christmas) you still get 70$ (probably you've bought it for less than retail though). Even if you sell it for 60$ it's still not too bad (60-70$ = +50%)
The Fire Brigade has been 150$ retail, looking at ebay 260-320$. This is +100% and yes it is "better" I cannot argue against this fact, but I don't know how widely available the Fire Brigade has been and if there have been any huge discounts on it, and since I have not followed helms deep too much (wasn't in the game) I cannot say for sure but my educated guess would be that there have been more discounts on that one = more opportunities to get it cheaper and to get MORE of them (+ it's cheaper to start with which makes it more affordable for smaller resellers).
You can say what you want, but +50% is not bad and assuming that you got helms deep for less than 130$ I'd say that +100% (like Fire Brigade) is not totally out of questions.
Of course not every set perfoms the same and probably Fire Brigade really is better than HD but still I wouldn't say that HD is "bad", especially not if you take the availability and discounts into consideration.
Please feel free to disagree but that's my opinion.