I got one in mint condition on Craigslist about 9 months ago for... $600. I ended up using it in a trade later since I just needed a channel switcher. Great sounding amp, regardless of the guitar put through it.
I got extremely lucky on that deal though.
And @maddnotez... wow, I guess we are completely different here. I run a reverb, delay, phaser, and chorus through the loop on my UL and I find the UL and Classic's series loops amazing and a huge part of why I love these amps. But then again, while I delve towards metal, I'm on the more psychedelic side of things (think Mastodon).