This 18k Gold 2 1/8ct TDW EGL Diamond Engagement Ring (I, SI1) drops from $6,693.99 to $6,024.59 today only during Overstock's Black Friday Sale. Better yet, activate this link to cut it to $6,019.59. Plus, if you are an O.Co member, you'll get $301.23 back to spend on a future purchase at Overstock. Not a member? You can add it to your cart for $19.95. There are only two reviews but both buyers gave it a perfect 5 out of 5 star review, with one buyer remarking that it was appraised for $9-10K. There is no sales tax (except UT).