I have a 1873 trapdoor Springfield. Does anyone on here know the value of these rifles?

Value depends on many things. Is it a reproduction or an original? Condition, has it been reworked in any way? Is it a door stop, wall hanger, or shooter? Is it the rifle or the carbine? Too many questions that your question brings up. The rifles, in 50% or better condition will bring anywhere from $500 to $2000 or more depending on the model number as well as it's background. The carbines will fetch more. Around $750 to as much as $10,000 again depending on history and condition.

It's an original never been reblued stock never been refinished or nothin like that. Not a speck of rust on it its a rifle model not a carbine. Bore is pretty clean not pitted or anything.

You have any good pictures? Closeups would be nice. It sounds like it would be in the higher evaluation % so it would be in the higher estimates of value. Also do you know the history of the rifle? I.E. anyone famous own it or was it used in any famous battles? SO many things effect the value of antique firearms.

Well I did a little more research on it today it was made in 1891 and around that time they say there wasn't any famous battles it could have been involved in.

Then what you have is an 1888 Model design. The 1888 was made from 1888-1893. If memory serves me correctly, I believe it was the last Black Powder version of the Trapdoor design by Springfield. The next Military design by Springfield was the M1903.

Whats the serial number and how is it marked on the Breech Block. If it is marked "US MODEL 1884" and has a serial number in the 500000 then it is a common 1873-1888 model. If it is actually marked "US MODEL 1888" then get ready for a windfall because those are exceedingly rare finds.

Serial # is 5033**. It's marked on the block US Model 1873.

Then more than likely I would say you have around $1000 rifle there. May get a bit more, may get a bit less. Depends on the actual condition as well as the mood of the buyers.

Is it 45-70 black powder?

Yes its 45-70 black powder.