[quote name='6v6' timestamp='1426094671' post='2714345']
Given the amount of excellent info on the forum (schematic/layout etc) you could quite easily order comparable parts from UK suppliers for around half that.
If I were going to build one (I'm quite tempted actually..) I'd probably select the comparable Hammond transformers, e.g those rated for the output tubes I wanted to use, then order a hammond enclosure and other bits from one or more UK suppliers:
http://www.londonpower.com/hammond/matching.htm
http://www.bluebellaudio.com/
Ok, Hammond isn't Heyboer, but IME they are easily good enough.
[/quote]
Actually I spent a few minutes yesterday starting to price parts on tube-town.net for Kevin O'Connor's "improved" Portaflex build from his TUT3 book - quite a bit simpler than the Trinity version with SS rectification, single channel, cathode bias 6L6 power section only. Got interrupted, but it was getting on for €300 for Hammond trannies, valves and chassis before adding any other components or hardware. I'd say all told you'd be nearer €450 (£320ish at today's exchange rate) by the time you'd be done, but with the added faf of machining a bare chassis, having a faceplate made to your own design, etc. I know, personally, I haven't the time or inclination for that end of things any more, so £600 for a full kit of parts and ending up with a superior amp would be worth the extra for me.
Having said that, I probably have enough bits and pieces knocking around and enough know-how to make myself something like this instead: http://arkhamsound.com/octling.html