>>6906111They do. Add it to your cart and check out. Before you click confirm order, there's an option to change your shipping method. Click that, and it will show you a list of options and estimated prices for each. Mind that I'm talking specifically about ToySanta here, other vendors may not offer any choices for alternate shipping methods or give you an estimate.
Also, this shipping estimate generally works for single or a few items. When I've made larger orders, it seems to get confused or is unable to accurately calculate shipping, so it's a mystery until I get my order confirmation.