Cheapest Way To Send A3 Posters?

Question

I've got 20 - 30 lots of A3 posters I need to distribute by the end of the week (each 'lot' containing no more than 10 posters), and I need help finding the cheapest, easiest way of doing this.

My first thought was that poster tubes would probably be too expensive (though if anyone can find some cheap ones, it'd help!) so card-backed A3 envelopes might be a good idea, but I'm having trouble finding any.

Help?

Answer 1

fold them up and put them in a normal letter

=]

EDIT: cant you just drive/ transport (bus or train) them to were you want them to go?

Answer 2

I would use cardboard tubes.

Failing that, I'd buy some cheap plastic drainpipe (about 40mm diameter) and cut it up to make my own tubes.