I have to love the sound of the speaker first. That means it sounds great to me in my room. Of course, I have to be able to afford it. It has to look good, because I don't have a dedicated listening room. Finally, I have to be fairly sure it will get serviced if something should go wrong.
I guess resale value is of some importance, especially if it is fairly expensive to begin with. That means it must sound good and have a good reputation. It helps if the company is still in business and has good service.
If the speaker sounds great, but the company is out of business or it is a one-person operation, that is fine as long as you plan to keep the speaker for a long time or don't care about resale value.