For anyone doing the "Pool Supply" shops. I have found on several of these that there is a small, palm sized squirt gun that is consistently $1.59. Also, if you check the spinning rack with all the little tiny replacement parts, you can often find a single or double pack of rubber washers for $.59 or $.69. I'm sure it looks suspicious as hell, but I don't feel any responsibility to make a "non-suspicious" purchase I won't be reimbursed for.
I actually think it's kind of funny from the employee's perspective. "Hmmm that guy just came in with no idea how to get sand off the bottom of the pool, but he just went and bought a $.79 replacement gasket for a pool vacuum he doesn't have."
LOL..
For the record though, I don't do this shop till it his $10.