Meteors (and meteorites, obects that are big enough not burn up and end up hitting the ground) are very common, I often see 4-5 every time I do a night flight of more than an hour of so. The well known showers such as the Leonids and the Perseids (happening now) can produce huge showers and a good one is one of the true wonders of the sky. Check out:
http://comets.amsmeteors.org/meteors/calendar.html
for an online guide to the regular showers.
Amazingly over 3000 tons of material enters the atmosphere every day, most of it burns up but a fair bit hits the surface and a quite a lot gets collected by people, have a look at e-bay, there is a lot for sale. Most shops that sell rocks, fossils and minerals also sell meteorites, they are sold by the gram but you can get a little lump for £20-£30. If anyone in the UK is near Kew there is a great little shop near the station thats sells some lovely stuff.