I can imagine 100 years ago the same argument could be made for whether to have a "new" girl friend or a "used" girl friend. What other guys may have deposited there, what you could catch, that sales people would look down upon you, the fact that you're a total loser for wearing used instead of new. A new one would conform to your particular requirements, a used one will carry the impression of the last owner. Once your done with them, do you dispose of them or give them to some other guy? Of course, used girlfriends don't seem to be any less expensive than the new ones, and I'm not sure where to even get a new one.
Talk about gross: search on ebay for used men's socks, guaranteed to be well worn by college jocks, and they sell for a fair bit of change, with lots of bidding activity.