Just managed to order the Halb CI.II late, Goring Fokker D.VII, Camel “Le Rhône” for 308 euros including postage to the Uk. Works out at about £295..
Got them whilst I could, would have liked to order more as an investment but a) I can’t afford that and b) other folks might want to buy the kits now too.
Also I chose subjects I may want to build, so the investment aspect would only matter if I don’t get round to build them and if I need the money later in life.