of buying used homeschooling workbooks with marks
have purchased used workbooks where the seller claims the
marks on the worksheets "can be erased". But unfortunately,
that can be easier said than done! many a homeschooling mom
has tried saving money on workbooks but find that often the
pencil marks of a child are quite deep and make many worksheets
show the answers quite clearly, even when re-photocopied.
As a rule of thumb,
unless you are looking at the workbook in person and can test
erase a few marks, try and buy workbooks that are "like
new" without marks, which are fortunately quite common
since many moms do keep their workbooks
in good shape with reselling the workbooks in mind.