I doubt much of anyone would not be willing to pay $3 for their perfect song. I think a better question to ask is "What would make a song worth a price of $3 instead of $1 or $2?" which is posed in this thread created by LuigiHann. Another more pertinent question might be "Would a frequently used price point of $3 significantly affect your DLC purchasing habits?"
The end result of a Yes/No poll for this poll's particular question does not strike me as ultimately worthwhile.