I tried this just as a test. It's the brute force method, for sure, but from what I can determine Beckett does not easily allow exporting of collection data.
I highlisted your traders from the first page, selected copy, and pasted some in a blank text document (Word) using paste without formatting.
Here is what I got:
1980 Kellogg's #25 Willie Stargell Near Mint/Mint $3.00 1
1986 Donruss #482 Len Dykstra RC Near Mint/Mint $1.50 1
1986 Donruss #512 Cecil Fielder RC Near Mint/Mint $2.00 1
1986 Fleer #653 Cecil Fielder RC Near Mint/Mint $2.00 1
1986 Fleer Update #U44 Andres Galarraga Near Mint/Mint $1.50 1
1986 Sportflics Decade Greats #50 Willie Mays Near Mint/Mint $1.50 1
1987 Donruss #621 Fred McGriff Near Mint/Mint $0.75 1
1987 Topps #608 Wade Boggs AS Mint $0.15 1
1988 Donruss #34 Roberto Alomar RC Near Mint/Mint $2.00 1
1989 Donruss #31 Gary Sheffield RR RC Mint $2.25 2
1989 Donruss #42 R.Johnson RC RR UER/Card says born in 1964/he was born in 1963 Near Mint/Mint $2.50 1
Once you have them in a Word document you can edit as you want and cut and paste them into a Bench thread, or a website you create, or whatever, but at least you have the information out of Beckett.