What sort of price would you call bank breaking? Are you only getting one to cover insurance?
For me, I needed a ground anchor to insure my bike being left in the garage. It needed to be a gold standard compliant for covering the bike's value and I needed it to be removable as I didn't want to spend that sort of cash in a rented place only to have to leave it behind. This left me with only one choice (pretty certain there weren't others anyway)
http://securityforbikes.com/removable-ground-anchor.php