I generally allow anything published by Paizo for Pathfinder (excluding 3.5 stuff). I do however restrict the race choices, I'm getting rather tiered of adventuring parties consisting solely of outsiders with no backstory to explain it.
First of all, FYI many people use cl1 paladin wands.
That is a very lenient of their GMs. The ones I play with assume all items are crafted by a wizard or cleric unless the group craft it themselves specifically to avoid that kind of thing.
I have been mulling over the idea of writing a guide on alchemical tools, weapons, poisons and related items, traits and feats. I was wondering if there is any interest in such a guide?