I bought a MIA-TXL roundtrip for $421 on Thursday (for the low airfare, not for an MR). Flying on CO in mid-May. Then briefly this morning AA appeared to be matching, which peeved me b/c I'm an Aadvantage member and would've went with them for the miles. However the AA fare was gone within an hour or two.
The Continental fare was only available through Orbitz and Vayama, and by the time I bought, it was no longer on vayama, so I went through Orbitz.
Funny thing is I found MIA-TXL for $377 ai on AF 2 nights ago, and didn't bite. I was so peeved the next morning when that fare was gone, but then hours later, all of a suddent CO has similar dates for $421 ai via Orbitz.
These random low fares that are popping up are quite welcome in my book. It's not summer travel, but mid-May is a great time to go to Europe when airfare gets this low.
Of course I'm still waiting to find a similar deal to 2 years ago, when I bought a peak summertime MIA-LHR RT for $488 on VS. I don't know if I'll be able to top that anytime soon.