Is adding requirements to an item actually a viable means of reducing cost

[Oxylepy]

When crafting a magic item the cost to craft the item is half the market cost, but if you were crafting for personal use could you add an alignment, and class requirement to reduce the cost further, either by 60% or (if stacking them instead of adding them) 51%.

Even just reducing the cost by either class or alignment you have knocked the item down by 30% the base cost, halving that and you only need to invest 35% of the market cost to make the item for yourself. With the above mentioned cost reductions it would be 20% or 24.5% the market cost.

That reduction alone is significant enough to make crafting something you don't meet the level requirements for extremely easy, for instance a +6 to an ability score would only cost 12600 for one restriction, or with two requirements 7200 or 8820 respectively.

That reduction alone is substantial enough to allow a level 5 or 6 character to create their own headband of +6 to their casting score.

Is this all rules legal?

[Saldiven]

Not to me because it ignores this paragraph that appears right before the chart (which so many people do when they want to create magic items):

"Many factors must be considered when determining the price of new magic items. The easiest way to come up with a price is to compare the new item to an item that is already priced, using that price as a guide. Otherwise, use the guidelines summarized on Table: Estimating Magic Item Gold Piece Values."

A +4 or +6 headband is still the same thing even with an alignment restriction.

Item creation feats in a campaign already circumvent the WBL guidelines fairly significantly; allowing creative use of custom item creation throws those guidelines right out the window.

[James Risner]

Oxylepy wrote:

crafting for personal use could you add an alignment, and class requirement

In general, this has been clarified by 3.0/3.5/Pathfinder developers as a way to reduce the selling price, but not necessarily decrease the creation price.

[Nox Aeterna]

I wouldnt since well , that is no restriction at all.

This reminds of a point buy system where you can gather extra points for your PC by taking flaws.

For example , your mage could take the flaw that said you can only cast spells if a certain item is in your hands...

BUT since the system lists all flaws it make perfectly clear that the GM should watch in case players start getting flaws that do nothing. For example a PC that is doesnt cast spells taking such a flaw and thus having no issues at all , but still getting extra points.

This is what you are trying to do here. "I will make this item for my personal use and i will set it with 100 requirements to give me extra points but no issues at all".

PS: You can already drop the price of an item to 25% using current pathfinder rules lols.