Do you guys sell on Amazon?

No.

VKB North America sells VKB products on VKBcontrollers.com only, and VKB North America only offers customer support for VKB products purchased at VKBcontrollers.com.

VKB North America is unrelated to (and operates independent from) any third-party reseller; likewise, any third-party reseller who offers VKB products on Amazon (or on their own webshop) is unrelated to (and independent from) VKB North America.