Tried to buy a second New V450D01 on AliExpress as a spare. Kept getting responses of Out of Stock, Discontinued and my money refunded. Placed an order direct with Walkera and got the same result. Walkera have advised me formally no stock available and is now out of production. Managed to buy the second last one in stock from HobbyKing as an RTF with F7 radio. Was more than I wanted to pay, but there is almost no availability of the heli now and it is a brilliant heli. If you were thinking of buying one you will need to hunt around for the dwindling stock.