I've always purchased Frontline from my vet. Wonder what others use and where you get it. I have several pups I am keeping and Frontline is so pricey - is there anything else that works well and is less expensive?

I am using Fiproguard, which is generic Frontline, and very happy with it. Does a good job on ticks.
Revivalanimal.com is a good place to get it.

Revival has 3-month supply of 45-88 lb for $39.99 and 6-month supply of 45-88 lb for $74.99.

If you live near a Costco, they have 3-month supply of 45-88 lb online for $36.49. I bought the 6-month supply in the store for $71.

Got 6 month supply of K9 Advantix from Petco (online) for $60 ($65 with tax)