What's the difference between expensive and cheap SQL Server backup products? I'm looking for SQL Server database backup solution and I have found many third party tools. But their prices vary greatly. For example, SQL Backup from RedGate or Idera costs about $900 - $1000 while SQLBackupAndFTP or SQLBackupMaster costs about $70. What's the reason? Does it mean that RedGate's or Idera's products are more than ten times better than the cheaper ones? Or they more reliable? They all do what I need (e.g. make schedule backups, store them somewhere and notify me by email), but I'm just  completely disorientated with such ten-times price difference. Do I miss anything?
Is there a particular reason you need to pay for a backup solution?

I think 'free' is always a good contender - Ola Hallengren's maintenance scripts are used by a LOT of people.

Simply schedule them using the SQL Agent.