used ipod: 30 XBT, now around $12,000
27" computer monitor: 18 XBT, now $7,200
cheap no-name digital camera: 6 XBT, now $2,400
50% share of a BFL Little Single, still on backorder: 5 XBT, now $2,000
5 BTC to a Pirate Pass-Through: $2,000, and the whole thing went bust 4 days later
On the other hand, when I quit mining I sold 3 5880's for $80/each, used that to buy 18 BTC, now worth $7,200
With a deflating currency you always have to consider your buying decisions carefully. But hey, prudent people have been doing that long before bitcoin arrived.
When you think about, it doesn't really matter. So if you didn't use BTC, you would use fiat to pay for these purchases, if they were really necessary. And that fiat could've been converted to bitcoin! Every non-bitcoin money you have on your accounts is a future loss
Buying with bitcoin supports its adoption, so it's all good. I would even say that if you need to buy something and you have an option to pay with BTC, convert your fiat money to BTC and pay with it!