I am looking for used car.some people suggest me to go with some police auction sites.Is it safe to go because I have check few those websites and it's require me to register with them and even send or charge my credit card as a fee.It's sounds tricky to me.Should I go with using those web sites in order to find good cheaper and reliable car?

Have you looked on ebay.As for the Police site there are some good ones out there i have heard from many folks whom have had cars from them,and with great service records.To be on the safe side ring the Police up even if you have to ring a few up to see which ones the Police use explain your worried about a scam site so your doing it the right and safe way first.

Yes,it is safeYou can find good cheaper and reliable cars there

Yes, however, I have found that some Police Auctions don't deal with cars (for some reason).