I love the T206 set, but a back run can be very expensive. Even in a low grade.
Blank- $1000
Lenox- at least $1000
Red Hindu- close to $1000
Piedmont 42- close to $1000
Uzit- $3-4000
Drum- $4-5000
Broadleaf 460- at least $5000
Lenox Brown- $8000
Old Mill Brown- $10-12,000 (and let me know if you find one for sale

)
Ty Cobb back- don't even ask
I suggest what an earlier poster said. Do a team run, or maybe collect your favorite HOFs. Perhaps a back run of a particular player.
Once you get started, you may want the whole set. And there are plenty of us here to help with any questions you might have.
PS- Welcome to Net 54