As with every purchase you make, price is always an important factor that will play a large role in where you buy from. It's important to know how to compare prices fairly and ensure that the quote for $500 less is not compromising where it matters most. Make sure you ask as many questions as possible if it's not stated on the quote so you can ensure the blinds you're ordering are fit for purpose.
The questions you need to ask
Why is your quote more expensive than another one I received?
This usually comes back to use of; different componentry, different fabric or different motors if you are looking at automation.