I would echo these comments. No knowing about the value or price if the different metals much, I can confidently vouch for the feel and performance of the palladium nib Visconti uses. They are every bit as good as the recent gold nibs, if different feeling and are beautifully finished. I have had a decent sample of these and found none of them unuseable as often claimed. The flow is usually generous and the line width tends toward the next nib size up compared with many others however a really good one is glorious to write with.
Actually, for a power filler acrosilk pen, the price isn't bad, just a non starter for import to the UK where import tax + VAT will be a killer and it can be had from Europe for less anyway.
Also, as usual for Massdrop the nib choice here is too limited.