I personally like the approach that JetBrains takes.  There products are also developer-targeted and not-necessarily cheap.<p>They handle this by showing the price, allowing you to download a 30-day trial, and then sending out an email soliciting feedback once your trial is about to expire.  The email comes from an account that is easily recognized as jetbrains, but instead of 'sales@jetbrains.com' or something similar, it actually appears to come from a person (i.e. john_smith@jetbrains.com).  This email could still be autogenerated for all I know, but I certainly felt a more personal connection than the usual "do not reply, this email was autogenerated" stuff that I normally get.