The 10-team postseason format was instituted in 2012. Here are some benchmarks to consider based on the 8 normal seasons in which that format has been in place.
Most wins by the worst team in a league to qualify for the postseason: 96
Average wins by the worst team in a league to qualify for the postseason: 89
Fewest wins by a team qualifying for the postseason: 85
Most wins by a team not qualifying for the postseason: 91. In other words, every team winning 92 or more games has qualified for the postseason.
Based on this, let's set 92 wins as the goal for this season. Given the 18-29 record when the poll was posted they would have to achieve a record of 74-41 in the remaining games to finish with 92 wins. To be on pace for that goal they would have to go 32-18 in the 50 games in question. Hence, I'd say a 30-20 record would mean holding but not buying. 25-25: sell Cruz, Simmons, Garlick, Robles and the like but keep core players. 20-30: listen to all offers and try to fleece someone. 35-15: sure, make a few buys; what the heck, it's not my money. 40-10 (as if) : go nuts!