how much does a game of rummy cost, whrited with sfml ?
Probably more than you'd want to pay. But let's play with the thought, just for fun.
You could probably get someone to hack something together in a handful of days for a couple hundred dollars, but I'd be willing to bet that it wouldn't be the game you wanted.
Let's take a look at what you are asking.
Let's say you just want the basic rules as outlined by
http://www.pagat.com/rummy/rummy.html , not any variations or anything - just the basics to keep it simple.
You probably also want to support at least 4 players in networked play - let's just say on a LAN, not anything fancy like internet play with game servers, lobby etc, just 2-4 friends playing on the local LAN.
You want to keep track of peoples scores, so we need to keep track of a simple highscore for players.
You don't want programmer graphics, you want the game to look good with graphics from a professional artist.
You want some basic sound effects - like a "swoosh" sound when a card is dealt etc etc. Not much, just a few sounds to give it a bit of atmosphere. We can probably leave out background music.
You probably want the game to run on Windows, but if your friends can use Mac OS X or Linux to play as well that would be nice. No mobile devices.
You naturally want proper installers for the supported platforms.
You want a professional looking and well working game that's polished and of a quality where people would want to pay for it.
If I was to make a very very quick and very very rough estimate of the above it would look something like this:
Implementing the basic game rules/mechanics, GUI, menu, highscore, etc etc. Testing it, bug fixing it, polishing it and so on would probably be something like 2-3 weeks (a week being 5 days of 8hours).
The network play side of things would probably take a couple of weeks as well to get perfect.
Then there's work integrating the graphics we source from an artist. The sounds we get from a musician, creating installers + all the little unexpected things that always crop up. Let's say that's a week as well.
So a rough estimate would be something like 5-6 weeks for the code side of things (and I actually think that's potting it quite low if you really want a good final product - I think I may be vastly underestimating the time, but let's go with this for the sake of the example).
6 weeks is 240 hours. If I was to do the work, my rate would be ~$80/hr, which puts this part at $19200.
We'd need to source some graphics from an artist, who would probably charge about the same as I would and would probably spend at least a couple of days creating the graphics. Let's say 3 days (24 hours) again at ~$80/hr. That's just about $2000 which seems reasonable but is probably a bit too low - but it's a game with fairly simple graphics needs after all.
We don't need much in the way of sound effects, just a few sound and they are all short. Let's budget $500 for those and hope it is enough.
Then there may be other costs like, if you were asking me to do the job I have easy access to Linux, but not Windows and OS X. For Windows I could probably get by with a virtual machine, but I'd need to at least buy a Windows license which would be somewhere in the area of $200. For OS X I'd need to buy a cheap Mac Mini which would cost me something like $1000 - naturally I'd bill these costs to you since they are part of the project.
So, let's sum up:
Development: ~$19200
Graphics: ~$2000
Sound: ~500
Hardware/Software: $1200
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Total: ~$22900
Which means that I'd probably give you an initial offer somewhere in the $25000 - $30000 range if this was not just for fun.
At that price you'd of course own all rights to the game including the source code etc.
If all you wanted was a copy of the final result + free copies of all future versions and I retained the rights to the software and could sell it on my own as well, then we could talk about discounts.
