I am not operating under that assumption either, but at the same time Collins will be 25 next year. You have to see what you have there after spending a 1st round pick on him. Not to mention the Sox scouts have always really liked him.
If you know anything about my opinion on Collins I'd rather they trade him if he has any sort of value. However, I'm struggling to see where the Sox are going to get LH power and OBP from besides him, even when you consider the trade market and FA.