[motoguy128]

You think a pro...on a professonal message board will admit the being willing ot negotiate.

From what I've seen, they won't move much. If you competitvely bid and they know you got more than one quote, they will normally go as low as possible but still hit their target net margins.

GO back through each wuote and try and explain the 25% difference. Is it just a less popular brand? Are they leaving soemthing out in the installation?

Sometimes a company costs more because they spend more money on equipment, training, better quality materials for installation and the equipment they sell carries a premium.