it would be the same thing as to buy a hermes clothes or shoes from a store, pricewise
So you got the watch without the strap from somewhere else? I've been to a store about more than a month ago, and all of their watches are sold with strap. In fact, the strap is what causes the price differences.
Also, I highly doubt that you can find separate strap somewhere else.
I have the watch with what is now a very worn-out strap, if you doubt that they do separate straps i guess i'll have to either find a replica ones that could use my original metal strap or custom order a leather one from somewhere....