yeah, craigslist, that's the one.
the c is for colour, you really should try the black and white, I much prefer it to the colour personally.
but I think the 100b is better than the 3000b.
edit: I forgot to say, that i's recommend the reporter. it always worked great for me, but you do have to rely on the magic eye, which can take can take some getting used to.
be careful when it comes to some of the all plastic ones as well, they are the cheapest but some only use the no-longer-available type 80 film (square)