Rolling Heavy-Duty platforms - $250 (Rapid City)

Heavy duty 36” square rolling ‘platforms’.
.
an example of usability is having two file cabinets sitting on top and being able to move them around in a garage setting.
I could also use these to stack plastic storage boxes and the same feature of moving around as needed.
The wheels are 3” lockable heavy duty.
Offering these to be sold as a pair for the price of $250 File cabinets (Hon) pictured are being sold also as a separate offering ($150 for the pair).