I didn't realise you were comparing the US pricing, you also need to add carriage, import duty and VAT. Also, us importers have been suffering exchange rates as low as 1.39$/£ recently so it depends on when stocks were purchased. To import for the US I would guess at $90 shipping, based on PayPal giving 1.605 $/£ yesterday gives £364.48 x 1.05 duty x 1.15 VAT gives £440.11. So less than Active agreed.