I'm not really impressed by Master locks (other than the pro series), although those are decent prices. As an alternative, if on a budget and need a $30-$40 lock (including shipping).
Here are some alternatives:
Planet Bike Extra Guard
has one thumbs down review, but for $15 + shipping, the price is decent for a low end lock that can't be Bic penned.
Planet Bike Super Guard
for $25 + shipping. Its not Sold Secure, but it appears to be beefy enough to fend off bolt cutters.
I say shop around online. You can get a name brand lock (Kryptonite or Onguard) for $20 to $30 (plus shipping) on some websites.