Who said 5-10m? I would pay 60-70m for a quickly maturing world class super young talent like Bellingham(as I would for the even better Wirtz). But when I say crazy I mean if he continues on this rapid rise in capability with Dortmund, they will demand 90-120m-ish for from EPL sides lol.
So that's out of the question. But if its closer to Vlahovic type sum, I would consider it. Top 3 most impressive young mids around. One that will likely dominate in top football for a long time. His type of talent is like a young Pogba that can defend. For him it doesn't matter if he is English or whatever nationality, he eventually belongs in a top club and whoever gets him will be lucky for a long time.
Rice is defenitely overrated tho, or not at all actually, everyone knows he is just a serviceable good DM, but West Ham will still demand crazy sums because they have no incentive to sell (they aren't strapped for cash), and know English clubs will pay necessary crazy sums for domestic key players in smaller clubs. Hence Maguire and Grealish sums.
With Bellingham the difference might be its Dortmund so maybe they won't hold off for only the craziest sum and move him on eventually for a high enough figure, and sign another talent for cheaper sum (tho this kid they bought for 25m pounds at 16...).