I have 2 sets collection for level 1, start no.123-132 and 133-142.
Condition 6/10 ( 1 book torn at the back, but I pasted tape already)
1 set = $20
2 sets =$40
I also have : Junior Young Scientist for 4-7 year.
1 set 5 books (1-5) = $10
3 sets 15 books (1-15)= $25
Please wa (nine seven eight...