I want to offer the same service or product in many different cities, so instead of creating a new content for each city what I want to do it to copy the content already created for the product and service of a city  and then change the name of the city and create a new url inside my website for each city.

for example let say I sell handmade rings in the USA, but I want o target each principal city in the USA, so I have want to have a unque url for ecxh city so for example for

Miami I want to have www.mydomain.com/handmade-rings-miami

and for LA the url would be www.mydomain.com/handmade-rings-la

Can I have the same content talking about the handmade rings and just change the keywords and key phrases? or this will count as a duplicate content?

content:

TITLE: Miami Handmade Rings

URL :www.mydomain.com/handmade-rings-miami

Shop Now handmade rings in Miami  in our online store and get a special discount in Miami purchases over $50 and also get free shipping on Miami Local address...

See what our Miami handmade rings clients say about our products....

TITLE: LA Handmade Rings

URL: www.mydomain.com/handmade-rings-la

Shop Now handmade rings in LA  in our online store and get a special discount in LA purchases over $50 and also get free shipping on LA Local address...

See what our LA handmade rings clients say about our products....

There are more than 100 location in the country I want to do this, so that is why I want to copy paste and replace..

Thanks in advance,

David Orion