inventory inquiry

https://hobbyking.com/en_us/turnigy-5x-5ch-mini-transmitter-and-receiver-mode-1.html

I want to buy this product. (Turnigy 5X 5Ch Mini Transmitter and Receiver (Mode 1))
Quantity : 30

By the way, I want to know if there is that much inventory.
This site can only select up to 20 items.

How can I live beyond that?

Please reply as soon as possible.
Thank you.