1. The 140 has always been "hard to find," but that hasn't translated into a higher sales price (in fact, pre-owned 140s routinely sell for nearly $10k below retail);
2. Most precious metal Panerais (gold, tantalum, platinum (except the 21)) tend to suffer the "new car syndrome:" they take a huge hit in value as soon as they leave the dealership;
3. If you can get a straight trade for the 289, take it.