I am a little confused with this topic. In particular, one aspect.
Core Rulebook, Spell-Like Abilities (p.221): A spell-like ability has no verbal, somatic, or material component, nor does it require a focus.
Bestiary, Summon (p.304): "A creature summoned in this way cannot use any spells or spell-like abilities that require material components costing more than 1 gp unless those components are supplied...."
Ummm, what? A spell-like ability doesn't have any material components. Says so in the core rulebook. No qualifiers, no exception, just a blanket statement. (I've also checked Bestiary 2 and Bestiary 3...the statement is repeated almost verbatim in each book.)
The way I read this, it can go one of two ways:
1) Spell-like abilities have no material components, costly or otherwise. So, no restriction. (Which seems to make the statement in the Bestiary unnecessary.)
2) The statement in the Bestiary needs to be amended: "A creature summoned in this way cannot use any spells, or spell-like abilities WHICH ARE BASED ON SPELLS, that require costly material components costing more than 1 gp unless those components are supplied..."
Or am I missing something rather obvious here?
---
Taffer