Quote from: conehead on June 24, 2012, 01:32 amI got the correct amount of BTC in my account and suddenly found myself to be short a few bit pennies. I thought perhaps my math was fail, so I sent some more....The prices changed again, a couple bit pennies... It seems the pricing is based on USD instead of BTC and fluctuated automatically?Oh the fail. Now I have to do another BTC-USD conversion =/Hi Conehead,Sorry to hear about your experience. Vendors on SR often peg their prices in Bitcoin to the USD equivalent as per MtGox e.g they can set the price of an e-book at USD 5 worth of Bitcoins. The number of actual Bitcoins will vary based on prevailing rates - the Bitcoin has been making large gains of late against the dollar but has recently dipped slightly as far as I can see (this is certain true for the BTC/GBP rate anyway).The best way to protect yourself as far as possible against fluctuating rates is to decide what you want to order before you buy your Bitcoins and then only get as many as you need to complete the sale (make sure you include shipping costs)- as soon as your Bitcoins arrive, use them to complete the order.I realise in this case the Bitcoin dropped before you could complete the sale but it's generally a good idea only to have as many as you need - you'll be pleased to hear that the Bitcoin seems to be a lot less volatile than it was...V.