When I went in for my first refill, the pharmacist at Costco was giving me a hassle--or he didn't know his own business. He was trying to tell me that T is a Schedule II substance and could only be dispensed in smaller quantities than the 10 mL vial that my endo had prescribed. The pharmacist was pretty snarky and said he would "let it go this time." That was all I needed to hear to come to the conclusion that I didn't want to keep going to that particular pharmacy.
With that said, Costco was pretty cheap when I went with the generic. You might find that your other alternatives are cheaper when you get generic.
Now I use Strohecker's, and the price is (as noted above) less than $60 for T, needles, swabs, and shipping. And they answer e-mails.