That would have to be something you decide for yourself Zip. I've had wonderful experiences with newer users around here, they've been the ones buying the GPUs, trying out the services and winning MJ's mystery boxes.
You could always ask for proof of funds if you are uncomfortable with their bid, giving them a chance to prove that their bid is valid. I would accept the bid personally, so I have no problem with it, but I've just seen a lot of benevolent newbies lately.