As the title says, Costco has these back on sale for ~$1.50 per can + tax.
These usually come on sale about every 6 months, so good time to stock up.
Normal price $39.99, $10 instant rebate takes it down to $29.00
Link for reference only (have to go to store)
These are great for most court surfaces, and generally the best ball you can get for $1.50 per can.