How much should I expect to pay for shoulder fillers?

Now that summer is here, I'm really self-conscious about my shoulder line.

I've tried working out, but my trapezius muscles and square shoulders seem like a whole different story, so I ended up looking into procedures.

But after searching online, I found that the price difference for shoulder fillers is bigger than I expected.

I don't think I should just look for the cheapest option; the volume and duration of the effect seem important factors as well.

I'm curious to know how much it usually cost for those of you who have had it done.