#1 - looks like Iran, Scott's # 173 of 1902, but that stamp is supposed to be perforated and your stamp is imperforate. In my estimation this is a forgery done for sale on the stamp collector market.
#2 - Bulgaria # 53, 5s issue of 1901 which has a catalogue value of mint - $1.25, used - .15c, forgeries abound.
#3 - Bulgaria # 78, overprint on 1889 stamp in 1909 which has a catalogue value of mint - $1.00, used - .50c
I'm using a 1999 catalogue, so values may have gone up, but not much, and in real life foreign stamps bring only a fraction of their catalogue values in the US unless they are rare.