It's much tougher to find an 84-85 Star in BGS 8.5 (particularly if centering is 8.5 or better) than a 1986-87 Fleer Jordan in BGS 9. That said, the 1986-87 Fleer Jordan is the Mickey Mantle of basketball cards and probably the most iconic sports card of the past 30 years. It is also vastly superior in terms of beauty and eye appeal IMO. It comes down to how well the 86-87 Fleer presents and to a lesser extent the subgrades (I would want all four subs above 9 to make the deal personally and would probably want some cash to offset the difference in value). I have a 1986-87 Fleer Jordan in BGS 8.5 (with subs of 9.5, 9.5, 9, and a mystery 8 for surface) that presents just like 9.5 and with a higher sub total than some 9's (ex. 9, 9, 9, 8.5). If you meant BGS 9.5, as Andy mentioned above, then you'd be getting a good deal straight up.