Over the last couple of months, we have had two devices at home start to give us trouble.
The first is a computer that we used to record over the air TV (our digital video recorder, or DVR). This computer started freezing at random times during the day. Freezing even while running a live CD operating system such as Knoppix or Ubuntu helped me come to the conclusion that this was a hardware issue, and not an issue in Windows. I began shopping around for a new or refurbished computer, but wasn't willing to spend less than $500, so I could get a PC that would last a few years. We have several PCs throughout the house, and one day I was looking at the specifications on one of these computers. It turns out that the processor was fast enough to work with Windows Media Center, but the PC needed more RAM. A $75 order for more memory on Crucial.com allowed me to re-purpose a PC we already owned and save a wad of cash.
The second device that started acting up is an older CRT TV. Lately, it would show the picture in color, but after a couple of minutes most of the colors would turn green, and almost make it unwatchable. One night, I got tired of the green color, and told my wife I was going to replace it. I started looking online for a nice LCD HDTV. I found several sales at local stores that I planned on visiting the next day. I planned on spending between $300 - $400, money that I had previously budgeted to go to emergency savings, but had not transferred to savings just yet. The next morning, I decided to look in the local online classifieds, and found the perfect replacement: $10 for a used 26" CRT TV (the same size as our failing TV). I called the number on the listing, arranged to pick it up, and brought it home. You know what, it works great, and even fits in the cabinet where we had our old TV.
For $85, we were able to get our home entertainment back to where it was before the devices began to fail. I could have spent around $1000, but this money had other priorities. Upgrading an existing PC and purchasing a used TV helped us stay in our budget.