Reading some of the posts, I know we will go to the vets because our piggies are ill but unless it's a real emergency, if you can wait about 3 days for delivery, I would suggest to get the diagnosis from the vet and decline to purchase the meds as you can get them way cheaper online. I imagine that vets charge a premium for them as they know people will buy them because you can't exactly find that stuff in your local chemist. It's like buying toothpaste etc from a dentist, they tend to rip you off but you can buy it cheaper in Superdrug etc. You are not forced to buy from the dentist, and it's cheeky but at the surgery you can just Google the medication and decide there and then if the price difference is significant enough for you to not buy it from the vet.
Obviously, if your piggy has had an operation/is very poorly etc then you really do need to buy the meds but depending on how long the course is, you could buy a weeks worth then get the remainder online.
I see there are some common names of medications: Baytril and Metacam for instance and they can be found in places like Animeds. Vetmeds etc. Research the cheapest prices and postage. You could even buy in advance if your pet is prone to illness already and you have used them in the past.
Just a suggestion to save the coppers and I know it won't work for everyone.