I bought one of these
http://www.ebay.co.uk/itm/New-Medieval- ... 385wt_1002 a while back ... seemed like "value for money", which it is, and good fun, when my lungs feel up to it
It's about the size of a tenor recorder or Bb clarinet, though it plays in F, an octave lower than a treble recorder. The perforated "bell" is mostly decorative, there's a tonehole in the body of the instrument below the RH little-finger hole which defines the lowest note, that is to say the instrument is probably some six inches longer than it needs to be ... and correspondingly heavier.
I'm not sure how "chromatic" it is, the holes are very small to enable half-holing with any accuracy, though you can cross-finger some reasonable approximations of accidentals with a little practice.
If you do a search on eBay UK for crumhorn there are some "less cheap" alternatives available from UK suppliers.
I must admit, the Susato Kelhorn does look attractively "different", though I'd really like to "try before buying" at those prices, especially once you factor in the costs of getting one into Europe.
I still quite fancy a pibgorn ... just waiting for Gafin Morgan to finalise his design for a plastic one
As an "economy starter" it might be worthwhile trying a bagpipe practice chanter, which requires a similar amount of effort to "get it going".