How many times have the beads shown in this auction been dated to the 20th century?  More logic:  Do you think a whole long string of 17th century beads can be had in this good a condition and sell this cheaply?  It's BADD (Bead Attention Deficit Disorder) and this seller and deputies should have figured it out by now.

http://cgi.ebay.com/GOOSEBERRIES-1700s-trade-beads-Venetian_W0QQitemZ320056125118QQihZ011QQcategoryZ3811QQrdZ1QQcmdZViewItem