Man, the Galaxy S6 may not have the sex appeal of its more expensive brother the S6 Edge, but what it lacks in looks it is certainly making up for in value. Currently, you can buy an unlocked 32GB S6 in black, white, or gold for just $430 at Monoprice's store on eBay. This beats the previous best price we've seen by a not insignificant $40.
This is the G920i model, which is the standard international version. It should play nice with most GSM carriers bands, but you can check the full list of supported frequencies on the product page. It ships free anywhere in the continental US and tax is only charged to customers ordering from California and Kentucky. Unfortunately, there is no option for shipping outside the US.
Be warned though, the seller specifies that as an international version of the device these phones are not covered by Samsung's warranty. However, you do have 14 days to return the device with no restocking fee if you notice something is amiss.
This deal is bound to sell out fast, so if you want one I suggest you act quickly.