Was hearing about the erotic massages in Prague and was thinking about trying candyshop maybe when I'm there, but wondering if there is ever oral/intercourse sex offered there and they just don't advertise it (same as massage places in US) or if its strictly erotic massage.  And are the prices posted the final price (prices seem pretty reasonable/less compared to US)

I went twice recently. Services were as advertised, with no extra cost.
After a nice session I asked a girl if there might be more on the table, particularly in an outcall situation,  and she said no.
That said, you never know, especially with older providers.  

The Candy shop booker was very helpful identifying providers who did both pussycat and french kissing.  
I had a very good time.