Gosh, OP was talking different things, like wool and such,

but I think the GSP was charging something like AU$28

for an A4 envelope

Reading that sellers fb though.  They are selling photocopies of photocopies

of photocopies,  ad infinitum - people can't read them anyway.

So many free patterns on-line

edit: just checked that item again. 

In the listing seller states  'please check my feedback for quality'