The 135/2L is a stellar lens. I've had mine since 2006.
It is one of the most inexpensive L lenses you can get, but its performance and IQ is first-rate. Ridiculously sharp, extremely fast to focus, and delivers very creamy bokeh. IMO and IME, it's a must-have.
I just got mine two weeks ago, and paid marginally over $3K from a large B&M. There had better not be a price decrease. :-)