Because the 3ds version is universally considered awful, it's a question of what the pieces are worth to you.
If you put the playpiece on the portal in 2.0 it will unlock almost all the 1.0 toys for Toybox, including the Tron identify disc. Figures unlock the toys for those figures, which you could buy with blue Sparks. Most 1.0 figures are largely underwhelming in the toy box as they lack the special moves that the official 2.0 figures have.
Especially with the B2G3 free preowned figure deal at GameStop, I wouldn't bite on tbis unless it were less than $12, since these figures and the playpiece are $6 each there, so you'd get the three figures, the 1.0 play piece, and some fourth random piece for $12.