asking for people who don't believe won't stop them, or you might not get the answer you're looking for.
that being said, i've seen one, they're not physical so don't expect Tinkerbell to appear in your room one night. faerie's rarely show themselves so it'll take time before you see one. anyway, one night my friends were camping out in my front yard under the Crimson King, one of my friends and i kept seeing a purple orb out of the corner of our eye for quite some time, eventually we invited it over to talk. we lite some incense and gave the faerie a tin of candies in exchange we could talk to it. just hi, how are you, you live in the garden, stuff like that. when looking straight at it, we couldn't see it, only out of the corner of our eye we saw the orb. also, in the incense smoke we could see the outline of the faerie, like when the smoke brushed past it's arm, we saw the outline of the arm.
granted, i don't work with faeries, and that's the only time i've spoke with one. hope that helped a little bit.