I have been testing and tweaking emails to get the best responses for over 4 years and I have compiled a list of canned email sentences that will increase your response rate.
You get more responses, you WILL make more sales.
For example, the $100,000 USD follow up email I am talking about was a sentence I used when I needed offers from buyers who were interested in premium domain names. I am a Domain Broker, I have brokered hundreds of domain names totaling in the millions of dollars in sales over the past 6 years.
This one sentence alone got me an offer back of $100,000 USD and we closed the deal at $105,000 USD