Nothing can't beat the elegance and grandeur of dragon armour. I mean, barrows came out with a lot of def bonuses and specials, but ppl didn;t abandon dragon did they? Well, I think that says somthing about it.
Personally, I don't care if they make hard-to-obtain items more common. I don't buy them, nor do I market, so the price makes no difference to me. I figure I'll get the dragon armor when it drops at my feet (like the shield half did.)
Well, searching Monsters thread on RSForums, there are countless absurd things about people getting 3 left halves and such, but they do seem to be a bit common. I also saw a Mogre thread where someone got a Left Half after 40 something kills I think.