No problem at all. Take the tank. The concern about the seals is the only thing that would have me worried. Just check all the seals in the tank carefully, and then do a test fill outside in case it blows. Let it sit for a couple hours or so and check for leaks. If all is OK, drain the tank, fill back up with water and add 1/8-1/4 cup of bleach (straight bleach, NO other chemicals), stir it around and let it sit for a couple of hours. Then drain out and rinse several times. Let air dry. Then set it up. I'd do a fishless cycle personally, but either way add a double or triple amount of dechlor (Prime) when you fill it up to make sure any residual ammonia and chlorine are removed.
Do these steps and your tank will be cleaner than a new one bought off the shelf!
HTH,
justin