Need value for model 70 super grade|Winchester Rifles|Forum|Winchester Collector

I have a NIB Model 70 Featherweight “SUPER GRADE” rifle, caliber .270 with ser.# G-164xxxx. It came with a certificate stating through the courtesy of U.S.R.A. Co., the Winchester Arms Collectors Assoc. was given the honor of first purchase rights via the membership of this assoc. for this special group of rifles. It also states that only 486 of such Super Grade Model 70 featherweights of this rifle were produced.  It is dated August 31, 1983.  I was thinking of selling it but I don’t know what it would be worth.

Thanks,

Rick