Just ran it thru AVS search engine. Someone picked one up for $800 several months ago, so if this is used, I'd look for a better deal. There is yet another thread asking for a comparo vs the Pana 4000, and it seems that most think that they will be much more similar than not. The difference is that the 4000 will be brand new, with a host of features.
The greatest detractor of Sony PJs is strube; just run Sony keyword with his name in this subforum, and cross-check for issues, including lack of vertical shift IIRC. Besides the unreliability he experienced.
Remember, the bulb ain't cheap, so factor that in when comparing with a new model. BMXTRIX normally advises against buying used, and I'm sure he has the experience/knowledge to back that up.
Crap, how come I never read your posts carefully, ok it's new. No warranty. I guarantee strube will tell you to run away.
One of the bigger fans of this model says that the bulb's brightness drops off quickly, but it should be said that bulbs are said to have great variation.
No warranty. Hmrz. I doubt it's possible, but you might add an aftermarket warranty, but there's the problem, probably not from authorized seller. I got a Mack 6 yr warranty plus two free bulbs for a grand total of $260.
Sorry, I can't be more specific. It's a good pj, good price, but then again, others will tell you have to see to judge for yourself.
edit: random reviews
http://www.projectorcentral.com/sony_vw50.htm
http://www.cine4home.com/reviews/projectors/SonyVPLVW50/VPLVW50Review.htm
http://www.hometheaterblog.com/hometheater/2006/10/sony-vpl-vw50-pearl-review/
http://reviews.cnet.com/projectors-presentation-devices/sony-vpl-vw50/4505-3180_7-32069200.html