I found a couple of excellent upgrade opportunities on midcon routes yesterday. SAN-DFW on December 20th for $146 and DFW-SFO for $150 on January 3rd. I purchased both of those upgrades at those amounts. On both of those flights, the upgrade offers started around $800 when I booked them a few months ago. They went down to around $500, and then they went down to $272. I wasn't going to bote at any of those. However, once they got down around $150, I feel like that's a great deal. As a platinum pro, I have very little chance of getting upgraded on DFW flights to any destination of consequence.