While the first month of the New Year (for many of us) is almost over, that doesn't mean it's too late to be having a New Year's Sale. Warmill is currently running theirs, but you'd better hurry if you want to be a part of it.
Warmill will be closing their webstore (temporarily) at the start of February. They're doing this in order to update the site's design as well as add new products. But in the meantime, from now until the end of January, you can get 25% off your order. Everything in the store is on sale, so just pick out what you want and get a bunch of terrain at cheaper than you'd usually have to spend.