I agree with daman40k. Seagate and Hitachi drives are excellent. Seagate has a very solid reputation and I rarely hear complaints except for the occasional DOA that every company has (I have used them my whole life with no bad experiences). I don't have a lot of personal experience with Hitachi and they haven't been in the HDD big-leagues all that long, but I see them put in high-powered builds that need high-performance drives quite often. And, um, @Majestic...Maxtor and Barefoot? Really?
I also agree with boiler1990 - you definitely shouldn't make it a point to get SATA 6 Gbps HDD's because the bottleneck is on the platter. If you go look at benchmarks you will see no difference at all between SATA 6 Gbps and SATA 3 Gbps mechanical hard drives. There is also little difference in cache sizes.
In regards to the original post...the Thailand "excuse" is not an excuse, but rather it's a reality. Hard drive prices are up which means that used hard drive prices are up. The value of a used item is totally independent of the original purchase price; it depends only on the market value right now. No well-informed person is going to sell you a drive at pre-flood prices.