Last night I just bought a set of NEW Dura Ace bar ends from a shop on Ebay for $50. I bought a set of Nashbar levers which are really nice for $15. They even include an extra set of hoods!
Nashbar who normally have the cheapest prices on normal Shimano stuff, lists 105 STI levers at $190.
But I choose barends because I PREFER the way they shift over the way that STI or Ergo shift. Of the last five bikes I've build, four of them have bar ends on them. And two of those are road bikes.
And NORMAL brake levers feel a great deal better under the hands than those fat combined shifter levers.