Can I negotiate on the price quoted for the cabinets?

What are the rules of etiquette here?
Do I have any power over what I pay?

As some of you know already, I am planning on getting new kitchen cabinets. I’ve gotten three quotes so far – one from the local lumber company [best cabinets], one from Lowe’s [ok cabinets], and one from a surplus warehouse [unfinished cabinets, cheapest].

I really like the cabinets at the local lumber company, and they quoted me 7600. Lowe’s quoted me 4300. What type of leeway can I make?

I don’t know the ins-and-outs of this type of life event, and I’m looking for someone else’s experience!

Thank you~