[BrianAnderson]

First question is if the app is profitable. If yes, I would look into a process like this: http://taptaptap.com/blog/the-easy-way-to-get-into-the-iphon...

I would first post an explanation to your users as to why you are moving on / seeking other opportunities. Also offer very preferential treatment if any of them are interested in purchasing the app. You are going to have to be very transparent on the fact you are selling because a) The fact that you don't know who to talk with first means it is likely you don't have the proper in's at competitors or obvious interested parties. This was me when I went to sell my first start-up. It makes it harder but a good product sells itself:) b) You need to reach a wide audience. Selling an app is a very illiquid market meaning not a lot of active buyers. By the way, I mean this in a relative sense. Yes, I know there are many apps bought every day but percentage-wise, its low.