Deere will likely have the best price on the filter. At least that's how it is here in western Ohio.
If however you go to a NAPA store or Tractor Supply, they will have one but it will also come with a new seal which does not come with the Deere filter!
Sorta therefore depends on what you want or need.
The seals seldom NEED replacement and if you decide to replace it you'll do some pickin to get 'er all out but I'm guessing you're not real familiar with all this or you'd not have asked the question. That assumption leads me to offer an extra word of caution!
Don't assume that big nut needs tightened real tight! It does NOT. You can make a LOT of work for yourself real quick if you tighten it as much as its size might lead you to think necessary. Tighten only enough to not leak. A 6" adjustable wrench would usually be sufficient if they'd fit the nut.