Since member CKNA apparently still uses a 7000, and professionally no less, he would seem to be the "final authority" on its current viability. If he says Pioneer is still updating it, and it can easily be set for 16x media, then anyone who ALREADY HAS an old 7000 that they picked up cheap and are not using should definitely pursue CKNA's suggestions.
As a counterpoint for the average user, however, I still do respectfully recommend NOT paying a significant price to buy one used if you DON'T already own one. The 7000, being a very early model, had various versions. Some are better than others and it is not always easy to tell from a quick look at the outside which one you have. Like any other piece of electronics, the 7000 is the sum of its parts AND how they were put together. It can have the greatest encoder of 2003, but it is still from 2003 and there are reported issues with some of them not being implemented up to par considering the cost of the unit. Some of them create funky DVDs that are difficult to import into some PC re-authoring applications. The 7000 does not have an HDD, so no editing is possible and DVD menus are text-only. The widescreen setting is nice but of little utility without an HDD for the average user: for that, get a later Toshiba DVR or just use a PC. Think of the Pioneer 7000 as the video equivalent of the early CD Audio recorders: insanely expensive, and utterly obsoleted within two years by better, cheaper products.
At the time it was sold, the Pioneer 7000 was an amazing unit and one of the first well-done DVD recorders. But we live in a fast moving tech world where 6 years is an eternity: the 7000 is now archaic. If you own one and it still works well, fantastic: its a great piece and deserves to be used for as long as it holds up. But it would be folly to pay $300 for a used one unless you ALREADY know the unit very well, have a specific use in mind for it, and can maintain/upgrade it. If you just want to own one for historical value, pick up a broken but mint one for $90, they turn up on eBay now and then. Otherwise, there are far better choices for someone who needs a daily-use DVR.