Thank you all for your advice, comments and opinions. I agree with those of you who said "beware". I decided paying $850 for a frame of unknown origin would just be foolish. I have decided on a carbon Scattante. Ultegra/105, FSA crank and headset, Shimano R500 wheelset, Tektro brakes. All very basic stuff but given that I am 58 and returning after 6 years of no riding I think it will suit me well. At $465 it is much less of a risk. Thanks again!