Chaim,
Hey, you're in Wickford, I'm in Providence. I've got an F3 also (love it). Anyways, my opinion is you should stick to the 50mm (I'm assuming it's a Nikkor) and bypass that so called deal. I really don't think it's a deal considering I've never paid more than $180 on a Nikkor lens off eBay. If you're just returning to photography you should learn to use the 50mm and get on the forum as often as possible to learn, learn, learn. I guarantee within a few months you'll be saying "thank God, I didn't buy that Vivitar and I waited for a better lens". I agree with the comment about the 105mm 2.5 which I own and love. I personally only use prime lenses and have never missed an opportunity because I didn't have a zoom. Just my $.02.
Ara