>Hi,
> Thank you for reply.
> My 1st copy of software is costed about US800 dollar. How should I charge for the following copy? It is my 1st time, therfore I also don't know to to mark the price. Do you think 10-20% discount is reasonable? It is too high or too low? I heard from somebody that, the following copies should be charged only about US100-200 dollar. Is it too low!!???

I have no idea; I don't know what the app is, how it's being sold/supported, whether additional copies simply add simultaneous users or represent separate installs, etc. You have to decide this for yourself; I usually develop apps for clients, whose decisions on resale affect me only in terms of royalty payments where they're the reseller; I got paid a development fee, and am happy to receive a small added fee per installation; they set pricing, and I already made my money, with added income derived from support and customization charges, billed at my normal rates, and paying a commission back to the vendor who referred the client to me for the added work. I don't want to be a software wholesaler, and would rather make my money up front and then let someone else market it and generate additional work for me; I'm not a salesman and stick with what I do well as a software engineer. Let someone who knows marketing, sales and all that play those games; I don't have the patience and personality to do that.