The best $100 you've spent on killer tech?

I look around at the technology I have bought over the years and every single item performs a specific purpose for a specific event. More often than not it is the technology which costs the least, or the gadget which weighs the less or is smallest in size.

With student loans slowly working their way into bank accounts across the country and the rest of the world, overdrafts are paid off and students find themselves in credit for the first time in months. It is this time of year where we often take a step back and think, "if I hadn't bought this or that, how much would I have in there now?". While we can always sell the technology and gadgetry that we have, it never balances out to the full amount you first paid out for it.

$100 isn't much to spend in the grand scheme of things, so I'll allow the currency to be interchangeable. It could be €100 or £100. (Perhaps not ¥100 as you really wouldn't get anything for this.)

What is the best $100 you've ever spent on technology?

For me it would have to be the Linksys Media Center Extender DMA2100 which I wrote about back in August. Though it isn't available for purchase online anymore, I bought another of the same extenders over the weekend for my television in my bedroom, alongside the 32" LCD television I have downstairs in my living room. At the cost of £84.99 at my local computer store, I wouldn't say that's too bad.

But I'm intrigued. Everybody is different - different jobs, needs, desires and preferences - so the floodgates to this are truly open. It can be anything from a new phone, a software licence key, something pointless and purely aesthetic, or a device which has saved a life.

Submit away; besides which, it'll be a great way to pick out things to buy for Christmas.