I heard another member of another photography forum,use the term 'carding up' his images to sell on his travels.

I am wondering where to buy to plastic bags and card used for this type of venture,The bags,I imagine a like those
clip seal bags for sandwiches-but bigger,where do you buy those bags?and how much? and what sizes do the come in?

What card do you use?,do you buy bigger sizes and cut to size? I was possibly thinking 5 by 7 the next size,and the biggest
8 by 10.

My son gets 4 by 6 sizes done,and sells them to people,that come in groups to visit our property for lunch,so was thinking
of may be having a go with larger sizes.But I do not want to do the frame ones,as cost too much,and they would not buy.

Any thoughts on how to do this 'carding up' would be great,But I am not sure if its going to be worth the effort.My son gets
100's of bird images etc printed at Big W for .15 cents each and sells for $1.50 each-no bag.Not sure if people will pay up to $10
for a bird print 'carded up'.

Thanks for any advice or links.