Grace, Model 707 was very good sound in its day. ($149.00). It worked well with the Fidelity Research FR-1MkIII MC cart when I had it. Joe is correct about only higher compliance though(no Koetsu on this arm!!). Like Doug, I owned Oracle for many years (Mk-1,2,3,4, and Premier MK II) I found the Linn Ittok, Signet SK-50,Triplaner,Well tempered and Zeta to sound much better. It was fundamentally very good, but the Oracle table was better than it was. By the way, the 5 pin armcable that came with the Grace is a real loser. It could be that I never really heard the arm! That is the major caveat with these older arms. Arms like the Well Tempered allow one to use their own IC, a real plus.(I liked the Well Tempered best of all)
Grace 704 and 714 were unipivot designs (704 was a real looker)