So if you had pedigrees and sold them in a mart , you wouldn't get any more than the average cow/calf?
In a store or fat ring, buyers buy what they see and, to an extent, what they know of the stock in front of them. First and foremost, what they see, irrespective of what the breed says or what pedigree it's got.
When it's a producer they don't know, then all they go on is what they see. When they know the producer then of course they are also able to include knowledge of how the animals are likely to have been reared and are likely to grow on. For instance, at marts which know BH and his stock, buyers know that our stock isn't forced and comes from heavy ground, so will grow on very well when pushed.
Could i sell them online, newspaper ads, to local farmers etc? or that unrealistic?
In selling pedigrees for breeding, track record is all. You need to have been doing it for
decades, and have been winning prizes - and the offspring of your breeding stock too - before you can really command the best prices.
Of course newcomers can break into this market - but it will take years, decades, to get recognition.