I purchased my humps a few years ago, and from a forum member. It came with the OEM bags, and he included shipping across the country. $400. I purchased the spinlocks... another ~$100.
Your $800 may align with the market price, but it also reveals youi an opportunist with zero sense of community. GLWS.
Yes, Javi. The spinlocks would work with the HT or the humps.