It is possible in Google Adwords to update your ads with parameters. These parameters can contain numbers, valuta’s and more. Instead of updating your ads over and over again manually every time your stock or product prices are changing, you could automate this with an Adwords Script. This makes updating your ad copy child’s play.
Unfortunately, it isn’t possible to use words in your parameters (valuta signs like $ and € are allowed). Besides of that, you don’t lose historical data anymore and it’s no longer necessary to approve your ads by Google.