I don't wear eyelashes very often for personal makeup but when I used to do ballet, I'd wear the same pair all season, 20+ times, sometimes the next season too (though maybe that's unsanitary). I just hated breaking in a new pair. I just peeled off the glue and kept using them. Maybe it didn't matter so much though b/c it was more for peole seeing you from far away than from up close.
Has anyone tried that "fiberwig" (I think that's the name) mascara from sephora? It's supposed to be false lashes in mascara form.