For what it's worth, my opinions:
With the Unimog you're on to a winner (sure, they were available for a short period with discount, but this set sold out across the country - this speaks volumes about its popularity and likely secondary market value!). It's a Mercedes licensed product, has power functions, is MASSIVE and it's going to do well
Most people think TB will make good profits based on previous Lego landmarks (Taj, Eiffel tower...), but who knows - this one has probably been hoarded more as a result (though this argument has flaws - people thought the FB was hoarded and it has nearly doubled in price just weeks after EOL...). A used set for 50% off is nice if you're planning to build yourself, but what that will fetch on the second market I have no idea (PS - regularly check Amazon.it, Amazon.fr and Amazon.es - a brand new TB in a sealed box can regularly be had for 190EUR delivered, which is about