If you are in the market for a new solid-state drive but aren't too concerned about speed or storage capacity but just need something very affordable to get the job done, the ADATA SP600 is available in a 64GB model for less than $40 USD.
Recently I bought the ADATA SP600 64GB SSD as I just needed a new drive for another system going into the basement server room for the LinuxBenchmarking.com initiative. With this new system to be focused on graphics benchmarks, I wasn't too concerned about the speed of the SSD and a 64GB capacity would be sufficient for this daily Linux benchmarking. When trolling through Amazon.com, I Ran into the ADATA Premier Pro SP600 64GB SATA 3.0 NAND SSD.
The 64GB drive is currently selling for just $39 on Amazon.com or the 32GB goes for $34. While I hadn't used an ADATA solid-state drive before, I decided to go for it due to the price and that it had 169 customer reviews with a 4.5 star rating. On NewEgg this drive has 44 reviews with a four-star rating.
Before commissioning the drive into the LinuxBenchmarking.com farm, I've been running torture tests on it and various other disk loads via the Phoronix Test Suite. This isn't the fastest SATA 3.0 SSD around, but it's cheap and is doing the job. ADATA USA advertises the SP600 as being able to deliver 430MB/s sequential reads and 70MB/s sequential writes. 4KB random reads up to 40k IOPS and 4KB random writes up to 30k IOPS.
If you're curious about the performance, you can find some benchmark results on OpenBenchmarking.org atop Ubuntu with the Linux 4.2 kernel and compared to a high-performance OCZ Vertex 3. If you want to see how your own system's performance compares, simply install the Phoronix Test Suite and just run phoronix-test-suite benchmark 1507121-BE-DISKSSDTE83.
So far I haven't run into any problems with this drive but after running it through daily benchmarking in the server room for a while, I'll post updates if there are any issues. If you're just after a low-cost 2.5-inch SSD, you can find it on Amazon.com.