Digital BW, The Print

Greetings,

I am looking for advice on storing individual inkjet prints that I am 
not going to frame yet. My plan was to put the prints in the plastic 
fold lock sleeves that Light Impressions sells to prevent surface 
scuffing and avoid handling marks. I use EPSG paper. I would then store 
in an archival box.

The cost of these sleeves is quite high however. (at least at Light 
Impressions).

Any thoughts or advice for me?

TIA