If you don't understand that saying "the Red Sox have not created a buyer's market" is completely ignorant as to how markets work, then I'm glad I'm not your real estate agent. You're like the house in my neighborhood that hasn't sold for over a year since they are asking for top dollar even though house that needs a complete remodel on the inside. The biggest problem with Price is his age, injury history and salary (just like in the house example). The Sox will only trade Price if the return makes sense. If the Angels (or whoever) only want to pay a certain amount for Price, the Sox will have to decide if it's worth it. The Sox can't just say "well, we have Price but we don't REALLY want to trade him to you" because it wouldn't increase the value of Price in a trade. If they say they want to trade him it has no affect whatsoever on Price's value in the market. Just like how the owners of the house that isn't selling would have no impact on a sale if they said "we're a really motivated seller and we really want to move." The market is the market. If there are other houses/pitchers on the market, a buy may just find another deal they find more preferable. If there is scarcity (as with Price), the value of Price is higher than if there are a lot of comparable pitchers that are available (and it doesn't seem that there are).
The Red Sox have not and can not create a buyer's or seller's market. The only way there'd be a buyer's market for Price is if there was a surplus of arms available. There isn't. The fact that the Sox want to shed payroll has no impact on them being able to move Price or as to what the return for a deal would be.