$300 sounds like there's bloodwork involved too. At least that's what I'd assume. Fecal, skin, blood, weight.
You also want to ask and make sure what they carry if your hedgie ever has mites(Ask something like... "If my hedgehog has mites, what are my options? What do you carry to treat mites?". WE all know the answer to the mite question, but because it's a life/death thing as well as a convenience thing for you(cause if they don't carry Revolution, then you'll need to find another vet anyways, unless they're willing to get it for you, but then on that note...They had no idea, so you don't know how much experience they have with hedgehogs. BUT if they're willing to listen AND they are willing to handle your hedgehog, then it's possible for yearly check-ups and minor details.)