if i change my meta title do i lose rank? Look inside

for example if my title is 

buy kitten mittens starting at only $1.00

if im ranked #1 for "buy kitten mittens" would my rank change

if i changed the price from $1.00 to $2.00 ?

basically im keeping the title but changing the prices. please advise  

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.