Excellent advice with lots of details! K.I.S.S. - keep it short and simple.
I see that you are a new member and I can't remember if I gave you my welcome speech. So, here goes just in case I missed you.
Welcome to OfferUp. Take the time to navigate and find your way around the forums where you will find amazing and useful information. While in the forums be sure to join the conversations, ask questions, share, hand out a kudo or two (thumbs up), earn badges and enjoy.