I say you save a lil more and BUY IT NEW!!! I ALWAYS buy my LVs new from the store because (1) you're guaranteed its authenticity, (2) great customer service with SAs who show you much more stuff than your eyes can take (i get really high from this...haha), and (3) first hand is always more 'personal' to ya than second. I get very attached to my bags and I can't ever imagine 'MY stuff' being owned by someone else beforehand. Iono... Some ppl just prefer to have everything new while others don't mind. For me, I'd only buy from a non-authorized LV seller if and only if it's a limited edition piece.
Sure, it may be more trouble taking care of the vachetta on the bottom, but doesn't this also mean so much more? I mean, if I spend about 1000$ on a bag whether it's used or completely new, I would naturally take REALLY good care of it. It's not like once you dish out all that money for a used bag, you'll be guaranteed to be able to bang it against the wall without worrying about the leather cuz it's STILL quite an expensive bag. Thus my point is, regardless of whether or not it's new, you should still take good care of your bag.
Anyhoo, good luck!