I completely agree. I'm not a business major but I'll give my. First and foremost I would like to say I'm just discussing and brainstorming, please do not take to offense anything I'm saying.
I don't think there should be a set price for any particular morph. I think there is a ball park suggested value for a particular animal, but no set market value. Determining the price is based off of a couple of trend graphs. The first being the Supply and Demand graph which we should all be familiar with. The second is the Price vs Quality. And lastly, the market value is in fact controlled by the large scale breeders; this is true if you look at oil and gas companies. Gas prices typically go up during the summer because people travel. Some could be doing it because they are trying to get out, or trying to sell it cheap so they can get quick cash. Now I'm not saying that selling an animal under suggested market value is a good idea, but it happens.
On the other hand I bring to question the market value an animal. For example the market value for a clown is $1500, but the individual sells it for $1100. Who's to say the market value is the correct value? There is no standardized price for specific morphs. Which brings me to the next question who sets the market values? The market values for morphs are set by the large scale breeders. IMO they base these prices on a few things (I'm going to try and make this as clear as possible). For example, I'm going to assume the parents cost $1000 each, they produce 4 eggs, food cost $300 per year, husbandry cost $550 (includes electricity), medical cost $150 per year, and lets say time spent is worth $400. Therefore theoretically an offspring's value is ($1000 + $1000 + $300 + $550 + $150 + 400)/4 = $850. You still need to make profit so you bump the price up 20% at minimum = $1020. There's always an X factor; how much do I think this morph is worth and what are the capabilities of it genetically? The X factor could 2x, 3x, 1.5x, etc... from the initial value.
In conclusion I think that there shouldn't be a justified market value. Everyone has in their own right to sell things how they see fit. I prefer buying quality things and don't mind paying for it. Sorry for the long post.