No, your rankings should be fine if you're just changing a price, marketing hook, or geographical info at the end of the title.
If it does negatively affect your rankings, then just change the title back to what it was before, and 99% of the time you'll rank back where you were.
Comments
If it does negatively affect your rankings, then just change the title back to what it was before, and 99% of the time you'll rank back where you were.