I would love for them to make some 1kg eBay branded satchels to use with eBay's click and send system.  I mainly use the 500g ones, and most of the 3kg eBay satchels I use are for items between 500g and 1kg. And with the eBay satchels its really nice to not have cash tied up in pre-paid satchels, and be able to pay for shipping the end of the month after sales have cleared and I've received payment.

Maybe I'll grab a 10 pack of these 1kg satchels anyway, and see how long it takes to use them up.