I use the Ebay Satchels and I always use the signature option... 

how important do you think this option is? 

It puts an extra cost onto the postage and I have some cheaper items that I want to offer free postage but that means I need to use envelopes and no signature to make it affordable. 

Is that a risk worth taking... 

In the last six months or so I have never had a problem with any delivery using the satchels with signature.... do you think I will have problems if I use the cheaper option?