Either you are trying to be funny or you don't know the item creation rules.
Try understanding the numbers you're looking at before you get all personal.Eyes of the Eagle are a +5 competence bonus, not +3, and are permanent bonuses, not a temporary buff that's action-activated for one minute once per day.
The Pale Green Cracked Ioun Stone can be applied to attack bonuses or saving throws, *and* has a doubled price due to its slotless factor: Bracers of Falcon's Aim are not slotless, as they go on the wrists. Which are a slot. The Pale Green Cracked Ioun Stone is also an 'always on' bonus, and is not limited to being action-activated for one minute once per day.
Deliquescent (not Delinquent) gloves offer not only an ability equivalent to a +1 enhancement bonus - something that a mere +1 to attack does *not*, as it does not also increase damage - but it is also 'universal', granting this ability to multiple attack forms, compared to the strict restrictions on weapons in Bracers of Falcon's Aim (two subcategories vs any held weapon, natural attack or unarmed). ADDITIONALLY it also has a second function, which as you recall adds to the price of an item. It offers protection from slime counter-damage as well as preventing their splitting ability.
These effects are, of course, permanently active from the item being equipped, as opposed to being action-activated for one minute once per day.
At most one could argue the critical-booster effect of falcon's aim is what requires a repricing. However, even if such a cost adjustment were made, there is no question whatsoever that it would then be reduced significantly in cost, by sheer virtue of being action-activated as opposed to continuous, and limited to a single charge, once per day.