Craig,
I've been watching Yaseu's on eBay for better than a year-and-a-half, and for $1000± you can pick your poison, so to speak.
The FT-990 is a good buy at around $700-$800 dollars, and can be found in AC only, AC/DC, or DC only versions. It originally sold for over $2000, has a large footprint, good receiver, SCAF filter and a good AT built in, along with a good history and lots of reviews. They are offered regularly with all sorts of configurations (filters, TCXO, etc.); but as with anything on the 'Bay, caveat emptor.
For a few bucks more, around $1200-$1300, there've been quite a few FT-1000MP's on the 'Bay, and that is obviously a fine rig. A couple of FT-1000D's have even been gobbled up that low, and that's one of the finest HF rigs ever offered to the amateur market (originally in the $5K range). FT-1000MKV Fields are in the $1300 area, too, and FT-1000MKV (200W) generally runs a bit higher, probably out of your price class at $1500-$1800 (it's out of mine, too!).
Keep in mind that these are former Flagship radios, and are all fine rigs. And be sure, there are Icom, Ten-Tec, and Kenwood rigs out there to be had in that price class, all exceptional rigs in their own right, and a grand will buy a nice one. My best suggestion is to get your hands-on the actual rig you are looking to purchase if at all possible. A 100 mile drive on a weekend is no big deal for a $1000 investment, and great peace of mind.
Oh yeah, I've got a '718, it's a great little rig, and really nice as main rig for the shack, though mine is currently a back-up rig, which I plan to use mobile. It's probably the best current production rig on the market, dollar-for-dollar.
I guess that's my two cents, good luck with your purchase, and let us know how you make out.
de Tony, W3FLH
73