We own three different weeks which trade easily into DVC resorts. If your week has the trade power to "see" current DVC availability online (WDW resorts) at II's website, it will probably work in the near future with an ongoing search too, as long as you are able to be somewhat flexible and avoid 2BR requests for the more popular times.
Look online at II for a studio exchange into Resort Codes BCV, DBW, DSS, DVO, DWL for "1" traveler, anytime between today and a year from now.
You ought to see something. If you do..., you can probably figure on being able to trade into DVC in the future, especially if you're
flexible with your search request. If you see no availability, add DVB and DVH (DVC's beach locations). If you look 3-4 mornings in a row (say, by 7AM eastern time) and you
don't see a single listing, it's a fair bet that your week
doesn't have the trade power to get a DVC trade at any time, even in flexchange.
My solid DVC traders are under $2,000 apiece. With annual dues under $600 (and a bonus week!) each, it's still a good way to stay at DVC resorts, even taking the added II membership, exchange and Disney resort fees into account. Here's the rub...
With DVC, you choose the unit size every time and all sizes are available on the first day of the home resort reservation window. With II trading, you are limited to what's been deposited - and forget about 3BRs, they're so rare.
With DVC, all times of the year are available. With II trading, Premier season is rare and then, only in a studio.
With DVC, you choose your check-in day of the week and length of stay. With II trading, it's a weekly stay, generally starting on Fri, Sat or Sun. Again, limited to what's been deposited.
With DVC, all DVC resorts are available. II does not list the newest DVC resorts, currently waiting on DAK - Villas at Disney's Animal Kingdom Lodge.
So, for people who want the full DVC system, and who will use their DVC points for DVC stays, it's great.

But for those of us who don't travel during prime holiday (crowded) weeks and who like a weeklong vacation, having DVC is more expensive than we need to pay. And for trading out, a DVCer pays a similar amount in purchase cost and points usage (annual dues) for vacations spent elsewhere as for DVC stays - again more expensive than you need to pay. With II trading (assuming a well-priced resale week with solid trade power like ours), it's much cheaper and worth the trade-off.... to us.
Here's
another thread on this topic. And btw, purchase price and II (or RCI) trade power are not necessarily related at all... especially when considering resales.