Hi Kilee,
We just got back from our second trip to WDW using Priceline. The two hotels that come up the most are the Wyndham Palace Resort and Spa at DD, and the Hilton at DD. Both hotels usually go for $60 to $65 a night. We stayed at the Wyndham last May and just got back from the Hilton this week.
I enjoyed the Wyndham a little better than the Hilton. The staff seemed friendlier and I liked the pool area better. The rooms at both hotels are very nicely decorated, and the location of both are great. I think the Wyndham might have been a little easier of a walk to the DD Marketplace, but both are across the street from DD.
I may not have liked the Hilton as well because we stayed at the Royal Pacific Hotel at US for a couple of nights before moving to the Hilton. The Royal Pacific is brand new, and I get spoiled easily.

If you normally stay at a Days Inn, then I think you'll be very pleased with either hotel that you would end up with. And who knows, you might get real lucky and get the Gaylord Palms. Although, I believe that normally goes for around $80 or more.
I've read on the DIS that the Swan and Dolphin will not be on Priceline again for a while.

I was hoping to get one of them for our next trip in May and ended up with the Hilton again.

But I could do worse.

Bottom line, I think you'll be happy with any of the hotels from Priceline if you're used to staying off-site anyway. Good Luck!