Alright, debate my maths if you wish, I may have got this wrong but what we have here is:
Cursed Pumps -1:
Siren's Macrame: 500k
Velvet Cloth: 5k
Gold Thread: 14.5k
Rainbow Cloth: 20k
Manticore Leather: 10k
549.5k x10% HQ rate = 5,495,000 average per HQ
Voodoo Pumps: 5.5m (lazy and rounding up)
Eschite Ore: 200k
5.7m x10% HQ rate = 57m average per HQ
So that would be your absolute minimum selling price.
EDIT: Did some maths for Voodoo Sollerets too:
Adaman Chain: 10k
Adaman Sheet: 30k
Brass Ingot: 3k
Thick Sollerets: 38k
- Steel Sheet: 10k
- Darksteel Sollerets: 28k
-- Darksteel Sheetx2 :20k
-- Greaves: 8k
81k x 10% HQ rate = 810k per HQ
Voodoo Sollerets:
Cursed Sollerets -1: 810k
Eschite Ore: 200k
1,010,000m x 10% HQ rate = 10,100,000m per HQ