For $1000, you may be able to buy new. You could afford a Fuji Touring, Jamis Aurora, Novara, or even possibly Surly Long Haul Trucker on closeout.
The advantage to buying new would be a getting a proper set-up plus some maintenance support (Usually 3-6 months (possibly more) included from a good shop) while you break-in and fine-tune your bike.
Any savings you have from going used can quickly be eaten up by unexpected maintenance. Those cables, the chain, cassette, etc.. certainly aren't going to be in new condition. An overdue chain and worn out cassette can set you back well over a hundred, quickly.
Last edited by Marc40a; 03-30-16 at 09:28 AM.