I'm trying to do some personal research, and look how PPclick prices compare with PPcall.
I've read most of ClickZ excellent articles, through which we all know about the minimum $2, average
$6-7, and the $10 that Tulsa lawyer Fraiser pays :)
I've been curious, though, to know if there are some figures available for keywords such as:
Dentist (I saw on SmartPages and SuperPages some are using PPcall)
Physician, Plastic Surgeon
I'm trying mainly to locate the early adopters of PPcall.
If there are any references to articles discussing this issues, I'd be happy to learn.