you can buy 1 of anything but most online dealers have different shipping breaks at $300-500 and then over 1k-1500 so it would pay to save and get mode OZs at a time. most get around $8 min.
5.95 shipping for orders under a $100 I believe. I'd try and wait for a bigger purchase to spread out the shipping costs though if possible.
You might also look at Silvertowne. They have free shipping on a number of items, including their own silver bars and any world coins such as Maples, Pandas, etc. even if you're buying just one or two.
I am not 100% sure if Silvertowne has changed but there a short list of Payment/pay pal Was a No for the item + credit cards were few if any. but I have not used them since 2008 2009 so a lot could have changed. :thumb:But they Do have just about any .999 -90% silver Item made! I am not saying that good or bad just tell what I know