I think this varies by market and how you plan on selling your work.
For the average person looking to hang images in the their place of business or home, the amount of prints of the same image in the market place is not going to matter, nor is the process of making the print. Certain people may prefer certain types of prints, but overall how you print them is not going to matter.
With this market though, which will be low to mid-end, you are really looking to make money on scale.
For the high end markets, especially those in NYC, things are different. Once again, the print methods do not have an advantage over another, but all galleries will have a preferred print method. For instance, a gallery may be selling only silver gelatin prints and therefore would not be interested in inkjet, or vice versa.
All galleries in this market will prefer limited series though. You will probably only be allowed to print 25 versions in each of three or four different sizes of any one image and you will need to number them. This is because high-end buyers want to make sure their purchase will appreciate in price; this would not be possible if an unlimited amount of prints could exist. As an image grows in popularity, you will be able to sell those remaining prints at higher prices.
Typically photographers in this market will also make three to five additional prints of a different size they will mark as artist's prints. This is partly meant to allow the photographer to keep a printed record of his work, but also sell later on. As you could imagine, if all of the prints sell and then 10 years down the line, the price in the private market goes up considerably and buyers are now making much more money from selling your work, you would be left with a bad taste in your mouth. In this case, the photographer would sell the artist's prints to cash in.
But, as you can imagine, if you start printing them off again, the price will go down, so the limit here is really five.