Just get a U-Lock off Amazon. It's cheap as heck. $38 for Onguard's flagship
http://www.amazon.com/OnGuard-Brute-.../dp/B000FL4Y3S. Kryptonite's flagship is only $64
http://www.amazon.com/Kryptonite-Sta.../dp/B000BS0D4Y. Both of these are within your budget as they come with free shipping. LBS usually overcharge for stuff when compared to buying it online. That $65 U-Lock at your LBS is only worth $43.75 from Amazon.