Reasonable, you think 30M+ for all this new -1 gear is reasonable.... you crafters piss me off, I sure don't think its reasonable! Go go lowballers flood him with tells!
The cost to produce is much, much higher than 30M for anything except feet.
With breaks, ~67 synths of dragon greaves is 134 wyvern scales, 67 silver thread, and 20 minutes of synthing with 80s bonecraft minimum. If no NQ ring, amount goes up. Add roughly 64 dragon blood and another 20 minutes of synthing with 105+ alchemy to make 4 cursed greaves-1. Synth 4 cursed greaves-1 with 122 alchemy to make one voodoo greaves. Thus, cost to produce voodoo greaves is around 13M.
Now, if you change it to cuisses, you're unable to T2 the voodoo piece. That means you need 4x as many synths, putting cost at 52M(and over 2 weeks supply of materials on asura, 3-6 months on most servers). Nobody is going to sell something that costs over 50M to make for under 30, that's silly. Most pieces look even worse.