Quote (proverb like structure) of knowing one's options

I'm looking for a quote to use in a sentence that says if it's free and doesn't cost anything to know your options (like a free estimate to a customer) then it can't hurt to find out. And that knowing your options in life is very important.

Solution 1:

The it can't hurt to find out part reminds me of the saying:

There is no harm in asking.

This uses the there is no harm idiom:

Doing something may be good, pragmatic, or beneficial, and will not cause any problems or harm
_{The Free Dictionary by Farlex}

The knowing your options is important part reminds me of the cliché:

You should always look before you leap.

Which uses the look before you leap idiom:

Think carefully about what you are about to do before you do it.
_{The Free Dictionary by Farlex}

Solution 2:

The first, “it can't hurt to find out,” notion reminds me of “It costs nothing to ask”, and its variation (f): “You lose nothing by asking, and there is a chance to gain something lasting.”

(from A Dictionary of American Proverbs, By Wolfgang Mieder, via Google Books)

You could use those two as follows:

It costs nothing to ask us about your options.

or

You’ll lose nothing by asking us about your options, and you’ll [even/probably] have much/something to gain.

As for “knowing your options is important,” maybe you could flip and play upon the inverse of the ideas expressed by:
“Ignorance is bliss” (from wiktionary.org) or
“What you don't know can't hurt you” (from thefreedictionary.com), as follows:

When it comes to (knowing your) options, ignorance is NOT bliss (and it costs nothing to ask us about yours).

There’s nothing blissful about not knowing/being ignorant about one’s options. (You’ll lose nothing by asking us to help discover yours, and you’ll [even/probably] have much/something to gain.)

What you don’t know about your options CAN hurt you (and it costs nothing to ask us to help you find out all you need to know).

Not knowing your options will cost/hurt you much more than asking for our free, no-obligation estimate/consultation.