Just change the wording in the add and title.

For the second add just use a quick description and then put "for full add click here" and put the link to the previous add.  Has worked for me in the past, I'm directly between 2 cities and do this alot.

Use a different email address.

Homer

I never had this problem. Posted in my hometown and than copied and pasted onto another city 3 hours away. But like everyone else said change the wording a little and post the link from the one ad on the other

I done it for years, just word it differently each ad, its only recognition software you have to trick.

kijiji is the same way i just type some random crap post it then pull the original up on another tab and on the randow crap one go to modifiy add and just copy and paste from the original add but some times they catch this and delete it again in my case i live half way in between kingston and belleville so i like to post on both areas

but some how you still see double adds in a row not sure how they do it