How is this tv someone is trying to sell me it for 700 dollars is it worth it?

I tried to find out more about this model such as year of manufacture but customer service is closed.Here is the link if you would like to know that info as well as other questions/concerns you may have.
http://support.jvc.com/consumer/support/index.jsp
Here is a forum about a few minor problems people have encountered with it.
http://www.avsforum.com/avs-vb/showthread.php?t=776872
The more I read,the less I like it.When buying an HDTV,the current technology is 1080p and this TV has 720p,so it is at least a few years old.Also when buying an HDTV,there is a thing called dynamic contrast ratio.I could not find out that number for this model but we purchased one recently and it has an 80,000:1 dynamic contrast ratio.This number has to do with the contrast between darkness and lightness,basically making them more clearly defined.So for this number probably 50,000:1 and higher is good.You probably also realize that a 61" TV should be in a fairly large room.To sum all this up,I probably would not buy this TV at any price.We paid $650 for a 42" LG with much better specifications and more current technology.When I tried to research your TV,I googled basically the model number and when was it manufactured.The last page I saw showed the 720p and that's when I realized it must be around 2-3 years old,if not older.Plus if you google the brand name and the model number,you can find many forums where people talk about the one they already purchased.I just basically scan for problems which may be expensive repairs or common problems and warranty issues.Hope I helped.
Good luck! Greg

JVC DLP TVs are great TVS but I would not recommend purchasing a DLP TV used, nor would I pay $700 for a used TV!
The most I would pay for that TV would be about $300 as long as the lamp has been replaced within the last 4 months.
Save your money and add to that $700 and purchase a new flat panel LED TV, you will be much more satisfied with picture, performance, color processing, etc., you will probably have to settle for a smaller screen, but you will get a better TV in the long run.
GOOD LUCK !