I personally will not consider selling a product that does not have at least enough durability to withstand the ordinary threats found around the house. Chief among them is Windex, the enemy of all inkjet prints. A tiny drop wafting across the room can put a bleached white spot in just about any unprotected print, in about 1 second. For some real fun, spritz a bare print with Windex! It's an ethical thing, I feel compelled to protect my customers from themselves, and I also like to avoid bad word of mouth. You can tell somebody 10 times not to use cleaning agents but then they will, or the maid will, or somebody in the family will. An unprotected piece of art on the wall has very little chance of surviving more than a few years. Just a moist finger-poke or a gentle wipe with a paper towel or rag can kill it. And it will piss them off, long after they forgot what you said, or even if they remember.
I stopped doing editions early in my revived photo career. Glad I did! I lost a couple of popular and impossible to reproduce images to editions of of 100. Otherwise I probably could have earned a lot more on each. Subsequently, I have several open editions in the coupla-thousand copy range with plenty of sales potential remaining. Editions don't make a damned bit of difference to 99% of my clients. "If I was editioning this piece, I would have to charge $5,000 instead of $950." That's all it takes. And don't forget that open edition prints of Maxfield Parrish's "Daybreak" were in something like 20% of American households during the 20's, which beats even Andy Warhol's "Campbell's Soup Cans" and Da Vinci's "Last Supper." The Holy Trinity of American Taste. I'm just over 2,000 for 220,000 on one particular image here in Albuquerque, that's not even 1% and points up the importance of maintaining multiple venues reaching different segments of the population, and also the non-trivial potential of marketing local interest images.
A 20-person co-op? That's gotta be tough, co-ops are like being caught in the middle of a civil war. Galleries are so much easier.