I would keep all of them but Jeffrey. I am in a $200 auction league as well. Doug Martin would go for 30ish. Jordy at least 20. Jordan Reed probably 8ish. You really trust Alshon? He is never consistent and injury prone. Kevin White is going to be the go-to WR on the Bears. Plus there are so many WRs that I don't think it's worth keeping any WR that's not a stud.
Now I will propose a similar question for my $200 keeper. I can keep up to 2 players. The cost is last year's draft price + 5*the amount of years owned. The price to keep each of these guys:
Brady - $9
Russell Wilson - $23
Kelvin Benjamin - $6
Josh Gordon - $8
Sammy Watkins - $20
I am definitely keeping Benjamin, but I am torn on if I should keep another. QBs have such a wide range. Like last year Cam Newton went for $3, Rodgers $44, Peyton $31, Ben $14. I love Wilson because he is a consistent 20+. Brady is also great since we have game bonuses for 300 yards passing, but I feel like the 4 game suspension crushes his $9 value. The same with Josh Gordon. Suspended for 4 games, and how good is he really going to be? Watkins is a stud, but so injury prone. He had foot surgery this offseason, and missed 3 games last year. For WR comparison, last year: Brandin Cooks $44, Jarvis Landry $21, TY Hilton $21, Cobb $51, Keenan Allen $27, Alshon $45, AJ Green $52, Emmanuel $37...
Now that I wrote this post I feel like I should keep Watkins and Benjamin.