1964 Washington Quarter With Die Break And Double Die Each Side.

I recently picked up some silver dimes and quarters for 20 times face value (around $130 worth). All but a couple dimes are Roosevelts and the quarters are all Washington's. Almost all of the quarters (around 60%) are 1964, most of those have seen very little circulation. It's been fun sorting and inspecting them for errors and looking for coins worth grading. I bought a 225X camera/microscope for the computer and of course the coins that look almost uncirculated to the naked eye aren't even close to being as good as they look. I found a dozen or more that has not one, two or three but four errors. Here's one quarters that not only has significant die cracks both on the obverse and reverse. It's also has double die errors both sides. I'd be grateful for any opinions or corrections from those with more experience as to whether it's worth the cost of having it graded.
The person I got this from must have gotten the roll of the die crack coins as I've found 10 so far with the same crack. I can almost watch the progression of the crack enlarging coin to coin. Strange part is, I also have 2 with a similar crack but no mint marks which would mean they came from the Philadelphia mint.