I buy and sell bags on sites like eBay.
Of course, I don't like the no return policy as a buyer. LOL! But I understand it. Out of the last 15 bags I've bought (new and preloved) 8 had a no return policy. It makes me pause to make sure the seller seems to be trustworthy, the listing is accurate and complete and that I want the bag before I buy. But it doesn't stop me from buying. I always know that if the item isn't as described (damage not reported, it's a fake, etc.) I can return it. And if it is as described, I want it. So no worries.
As a seller I have a no returns policy because I accurately describe the items I sell. In fact if anything I really undersell them so the buyer will be very happy to avoid issues. So after providing a very detailed description and the maximum allowable number of photos, I expect the buyer to know what they are buying and be confident they want it BEFORE buying.
If they decide they don't want it because they misjudged the color, size, etc, I expect them to keep the bag as that was their error. If they try it out and feel it won't meet their needs I still expect them to keep it. That was their misjudgement. (When I make those kind of mistakes when buying on an eBay kind of site, I keep the bag and resell it. I don't send it back - the seller wasn't in error or fraudulent. I kick myself for not buying better and accept the consequences. I don't expect the seller to make up for my error.)
Also, people buying from me are getting a discount because I'm an individual not a store. I can't charge the same price that
Fashionphile, etc can charge on the exact same bag. So as a trade off of the buyer enjoying that discount, they don't get the generous return policy a store, which does a volume business, can give. If they want that privilege, they need to pay a little more with a store.
One other issue with returns is people rarely care for your item. I used to accept returns within 15 days of receipt. Then I got one bag returned in a box much too small for the bag. So I now had a damaged bag I had to sell for less. Same with a pair of sunglasse that didn't have a case. I sent them padded in a rigid box. The buyer returned them with no padding in a flimsy box and they got broken in transit back to me. eBay doesn't make the seller "whole" in those circumstances. I also got several other returns just because the people didn't want it. I was out the original shipping and in some cases insurance. I'm not a store. I can't absorb those losses because someone changes their mind. And I shouldn't have to. So now I don't accept returns because I know more often than not my items won't come back as I sent it and I don't want to be out postage and insurance for someone doing a lookiloo instead of taking the time to really know they want the item. The better buyers know what they want and are educated on the item. I'm happy to pass up indecisive or uneducated buyers that have a higher likelihood of being a problem down the road.
I may sound a little hard line on this but I think that with transactions between individuals (vs. with a store) everyone has significant responsibility. The seller needs to be very up front and accurate on what they are selling. No excuses for not being able to take good pictures or measurements or clearly note flaws. Get the listing right if you want to sell. Then the buyer has a responsibility to read the listing, give the purchase some meaningful thought and only buy when they know they truly want the thing. Then they need to keep it when they just change their minds or decide they want something different.
At the end of the day, buying new retail with a return policy is an option. If someone wants a bargain, (like I do!) they have to accept they aren't getting the full retail experience.