Is Spotask.com A Legitimate Business?

There is a physical address on their "About" page, but no phone number.

But they also say "we are unable to offer refunds, exchanges or swaps of any kind" and that "you can always resell your purchase of a coin or material at any time" (if you can find a buyer, with no guarantee that you'll get anything close to what you paid).

Run away.

Edit to add: Their physical address is a UPS Store. Run away even faster.