1987 and 1990 Topps BB - How easy to get 10's from racks?

I have some opened rack cases of 1987 and 1990 Topps Baseball. Of course, they aren't the greatest products in the world, but I am wondering if anyone with experience on busting rack cases of there - how easy are PSA 10s from these products?
I feel like they are almost worthless trying to sell them as boxes, packs, etc... so I was wondering if these yielded a lot of 10s. Even if they are just 10s I can get $10 apiece on, I'm fine with that. Mets cards from 1987 seem to sell decently and from both years there are your usual suspects like Ripken, Ryan, etc... that player collectors like.
I feel like they are almost worthless trying to sell them as boxes, packs, etc... so I was wondering if these yielded a lot of 10s. Even if they are just 10s I can get $10 apiece on, I'm fine with that. Mets cards from 1987 seem to sell decently and from both years there are your usual suspects like Ripken, Ryan, etc... that player collectors like.
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CDsNuts, 1/9/15