I'm looking to rent a full size van for my church for their youth volunteer week. I'd like to get them the best rate possible (to reduce our fundraising needs).

I started with autoslash:
Your 3 Days, 8 hours Rental
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Rochester (ROC)
Pick-up: 09:00AM, Mon, Jul 24, 2017 - Drop-off: 05:00PM, Thu, Jul 27, 2017
The Autoslash rate for Avis full size van is $641.33

Here is the rate I could get using AARP
Due at pick-up: $628.11
Base Price: $495.88
Taxes and Fees: $132.23
That looks like a very good rate. Should I go with that one?

Thanks
Mike