So after I posted the above opinion, I felt bad about having done so without actual numbers to substantiate my statement. So I crunched some numbers to provide an example and let people decide themselves if its "outrageous" or "taking advantage".

Baytril as an example: a 1oz (30ml) bottle of Baytril solution at 1mg/ml (the dose/dilution I used successfully to treat my adult WTF who was suffering from a bacterial infection (green spots)

A 20 ml bottle of 22mg/ml Baytril runs about $42.00 so this is about 8 cents worth to make the above.
Distilled water is less than 2 cents per ounce.
The most expensive 30 ml plastic med dispensing bottle I could find went for 1.65 per unit. (some are as cheap as 10 cents)
An EXPERIENCED vet tech makes anywhere from 10-15 dollars an hour. Lets go with 12 dollars and hour for this estimate: Lets pay the tech for 5 minutes to package said perscription and print a label for it. That would be about $1.00.
So total cost to Dr. Frye for 1oz of Bayril solution he sends you: $2.75. I believe I saw the price as $24.00 + shipping? I apologize if I have his cost wrong as I did not verify it.