Delivery took about 2 weeks. I bought it in April & haven't needed replacement silver rods. I have 14 gauge silver wire that I already had from when I used 4x9v battery method & I just use this with some reusable electrode adaptors which Ken from silverpuppy sent (haven't needed to use the standard silverpuppy electrodes yet). I make my own distilled water as I'm not sure where you can easily get it in the UK, I'd try Halfords but it's so much easier just to distill your own (tastes better too). As to cost the shipping cost was included in the price on my invoice, it was $150 for the cs generator & magnetic stirrer & $12 for a voltage adaptor. With the exchange rate at the time it worked out at about £80 for the generator & shipping. I'm not sure what the rate is now or if the prices have changed.
If you're considering a silverpuppy I'd suggest you e-mail to see if he can do one with a 240 voltage & UK plug as I think he was looking into this back in April.