You mean after reading all this info you didn't opt for this 135mm: Pentax-A* SMC 135/1.8 #5565363..Minty/Case..EX.Rare - eBay (item 390043103236 end time Aug-06-09 20:05:27 PDT) Gosh, if the one from Japan for $1900+ has been sitting in ebay stores, unsold for a while, what makes this seller think they can get that??? I guess that Sears will save you some coin, though.
Or the Pentax-K 135/2.5...Oh, I forgot...the OP wanted a reasonably priced option! Steve (Wish the 135/2.5 were a little less expensive...)