Am completely happy with my vacuum packaging machine. It's a Sunbeam VS4300 bought from HN for $115, but I think you could pick it up cheaper (did see it in BigW for $108).  Don't know about those being sold on eBay, but when mine packs it in (have had it for nearly a year now) I will probably look at it. It has more than paid for itself, both in time saving and postage and also peace of mind.  The food grade 6m rolls I buy from Nth Qld and come in 28cm and 22cm widths.  They are cut to size as needed so no wastage.  I put a note in with my items explaining that the vacuum sealing ensures safety during postage and that after airing items will return to their normal shape.  And no extra packing materials are needed. Feedback from buyers has been all good.  Win Win