GG, I think everybody accepts that GX bonnets look cool, and are pretty hard to get hold of in good nic,
GX exhaust manifolds were falsely overpriced by their Need by the regulations in Speedway and the advantage gained over other cast manifolds, so they became the hot Item for those guys,
this majorly out priced them for "regular" Datto enthusiasts, now the rules changed, they are no longer in the regulations, all the ones Speedway have will come back into the market eventually,

in the real world, they should cost, +- $200,
the two I sold to Speedway +- $450

some other scammer a couple of years ago, was offering to pay $1500 for them, but when it came down to it $400 was his mark,

So Nobody is "harassing" you, just perhaps the quick fortune you are wanting might not happen in a hurry from the Datto crowd,

Free Bump, and good luck...