Yes, some places will try to rip you off
. Small fragments should cost very little. I have twice on ebay bought Nantan fragments (Nickel iron.) These packets of 200 grams or so should cost around US $ 20 or less plus postage.There are over 100 1-2mm fragments in such a packet. I give them to first timer child patients instead of a sticker. Gotta get them interested in all things astro early!
Yes, some adults get one too. I know I would have been over the moon if I was given a meteorite for behaving at the (establishment over which I now preside) as a kid. And you wonder why I am the space oddity.