or the cheap mega I got, which came in with a crappy crystal, all of a sudden my "deal" turned into "ship it back to us for about the same price you paid, then when we verify its our fault we will credit you" with a total time of 2 months round trip ...
and by the time I got the parts to fix it it cost more, and took 3x as much time in labor and emails than just buying the real thing from radio shack.
good luck