Considering that being eaten by that damnable bag is about the same as being fed upon by a barghest, i would not set the price low. I also would not sell the item due to the danger of it coming back to bite me in the ass.

Bag of Devouring said:

Creatures drawn within are consumed in 1 round. The bag destroys the victim’s body and prevents any form of raising or resurrection that requires part of the corpse. There is a 50% chance that a wish, miracle, or true resurrection spell can restore a devoured victim to life. Check once for each destroyed creature. If the check fails, the creature cannot be brought back to life by mortal magic.

Feed (Su) said:

When a barghest slays a humanoid opponent, it can feed on the corpse, devouring both flesh and life force, as a full-round action. Feeding destroys the victim’s body and prevents any form of raising or resurrection that requires part of the corpse. There is a 50% chance that a wish, miracle, or true resurrection spell can restore a devoured victim to life. Check once for each destroyed creature. If the check fails, the creature cannot be brought back to life by mortal magic.

As it happens, I suspect the bag HAD a price, only removed prior to printing. Otherwise it stands to reason the non priced items would have been placed at the beginning or ending of the cursed items tables. Thus the 'value' should fall between the 10,000gp and 16,000gp

01-05Incense of obsession200 gp
06-15Ring of clumsiness500 gp
16-20Amulet of inescapable location1,000 gp
21-25Stone of weight1,000 gp
26-30Bracers of defenselessness1,200 gp
31-35Gauntlets of fumbling1,300 gp
36-40-2 sword, cursed1,500 gp
41-43Armor of rage1,600 gp
44-46Medallion of thought projection1,800 gp
47-52Flask of curses2,100 gp
53-54Dust of sneezing and choking2,400 gp
55Helm of opposite alignment4,000 gp
56-60Potion of poison5,000 gp
61Broom of animated attack5,200 gp
62-63Robe of powerlessness5,500 gp
64Vacuous grimoire6,000 gp
65-68Spear, cursed backbiter7,500 gp
69-70Armor of arrow attraction9,000 gp
71-72Net of snaring10,000 gp
73-75Bag of devouring—
76-80Mace of blood16,000 gp
81-85Robe of vermin16,500 gp
86-88Periapt of foul rotting17,000 gp
89-92Sword, berserking17,500 gp
93-96Boots of dancing30,000 gp
97Crystal hypnosis ball—
98Necklace of strangulation60,000 gp
99Cloak of poisonousness62,000 gp
100Scarab of death80,000 gp

Though if you want a dissenting opinion, back in 1E Gygax set the selling price at 1,500 and those devoured were "forever gone".

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