If you decide to get a Blank Firing Revolver there are a few things you should consider.

ADVANTAGE: 
They look pretty good, very much like the real thing.
DISADVANTAGES:
First:  They will not fire "Balloon Breaking Blanks"  so you would not be able to use it in CMSA events or for any specialty routines, that we do in our show.  Simply put..all they do is make noise.
Second:  They CAN NOT be made to fire, balloon blanks.  The barrel has a Case Hardened Steel Plug at the base, that can't be drilled and there is a Case Hardened Steel Washer in the center of the cylinder that is just as hard to drill. 
If you do fire blanks...the flame and smoke exit the revolver right in front of the cylinder.....not good at all.
Third: Most of the blank firing guns of the 1800's will only fire 9mm or .380mm blanks.   So, you will need to purchase
your own blank ammunition, as all the blanks furnished for our shows is .45 LC.
Fourth: There is a RED plastic plug in the front of the barrel.  This can be removed, but you still have the other things to deal with.  So, about the only thing it is good for is to look nice in your holster or you can practice twirling with it.
Lastly: A nickel plated replica can cost about $130.00 to $175.00....  Not that much less than a Black Powder Revolver.

Black Powder Reproductions such as a Uberti or Pietta are a better choice, than the blank firing guns.  My first choice would be Uberti with Pietta a close second.  They both make excellent reproductions of the period and can be gotten at a good price if you shop around.  However, you are still paying for your own powder, primer and wads.

For some models, you can get Cartridge Conversion Cylinders for them.  These Revolvers lend themselves nicely to doing the stunt show and for competition in many sanctioned events.

Some BP choices that can be converted to suit CMSA and our stunt show are the Walker .44 Cal, the 1858 Army-Navy .44 cal, the 1860 Army .44 cal, the 1875 Army-Outlaw 45.LC and the Schofield-Smith & Wesson Top Break 45 LC that are made by Uberti and Pietta.  Pietta has a few additional models, as well.  The favorites and most well known revolvers are pictured below and made by both manufacturers.   A side note: Uberti is a subdivision of  Baretta Firearms.   Cimmeron and EMF are expensive and they sell the same Uberti and Pieta revolvers that other companies
are selling for less. 

If you can afford a cartridge revolver, outright, then I suggest the Uberti Hartford, Cattleman or Lawman 1873 in .45LC. 
They are outstanding reproductions, very close to the Colt 45 and are less than 1/3rd the price of a Colt. 

If you live in Wisconsin and are close to the Appleton area I suggest contacting me before you buy.  We have a "Gunsmith" FFL dealer, on Staff, who can get your revolver for more than a reasonable price.

If you have other questions just ask.  Its better to ask before you spend than to get stuck with something that is too
limited to serve the purpose for which you are getting it.