I'm in Australia so I doubt the costs will be comparable, I got some of the cost back through our public system the rest of it I had to pay for. There's the cost for the pellet but also the minor surgical procedure - local anaesthetic, incision and, after inserting the capsule, stitching it back up. For me it was (from memory) $AU300-ish (?) but that has lasted me 9 months so it's a reasonable trade off - but probably not as cheap overall as tablets or injections (?) (dunno).