Here's a little item editor

[GRUMPY]

I use this editor myself, I like it a lot.
In the items table there is two columns to control the pricing of any items on merchants.
One is price and the other is sellrate. The sellrate value can, (and does) increase the base price you set
on an item. If the sellrate is set to 1, then it won't mod the base price. If you want a query to practice
with, it would be like this:

UPDATE items SET price = 100000 WHERE name LIKE '%crude defiant';
UPDATE items SET sellrate = 1 WHERE name LIKE '%crude defiant';

Of course you would need to add lines for the other named defiant gear.