Heavily Used Hi-Temp Bumper Plates - $30/pair
Rogue Fitness Jerk Blocks - $300 (This was an amazing set that retails for $972.50 from Rogue and included (2) 2.25", (2) 6", (6) 12" boxes. If I had any room whatsoever, those would have been mine.
I am not even sure what I would do with Jerk blocks which are primarily used for training Olympic lifts. An athlete could rack the barbell and attempt a jerk safely or do multiple reps. I have seen folks use them as part of metabolic conditioning in the form of up and overs.