You're meeting in what will be a well lit, public parking lot. She suggested it for her safety as much as yours! Call your husband and let him know where you'll be and when, text him when you get there (give him her license plate number, just in case), and if he doesn't hear from you in, say 15 minutes, tell him to call you. OR stay on the phone with him the entire time. Either way, make sure you get in touch with him afterwards so he knows you're okay :)
I do a LOT on craigslist, mostly selling, and I'm pretty craigslist savvy ;)
The pump is fine, but REPLACE THE TUBING and other pieces that aren't brand new on it. you can get them off medela's website. It will need new membranes also, for suction. You might want to test it out on the spot.