@davewil1964 wrote:

I buy C5 prepaid envelopes @ $2.30 each (in fifties) and C4 prepaid @ $4.23 each (in tens).

 

Both are good for up to 500g, so C5s are much more cost-effective (for me) than stamps or tracked C4s.


Yes but the whole point is the tracking, available with the cardboard envelopes.