Prices do vary significantly from home-home and from resort-resort, the thing to be aware of ..is...you do often times get what you pay for! If a home is significantly less expensive (there are those in my resort too that charge less than we do)... it's often not as nice inside, doesn't have as many amenities, etc, or as we like to point out, so as not to be negative, those are "standard" accomodations, ours are "platinum" level! hehe =p (It's true though!) It kills me when I get someone trying to get us to drop our price / rates because they can get $xxx from so and so in some other resort, we know they're not comparing apples - apples. You can also tell by someone's online calendar how popular their places are, and how long they've been "listed". If they've been doing this for years and their calendar is completely empty, not a very good sign, is it?
Just last week I had a discussion on the phone with a DISboard member who arrived in her home and was disappointed with what she got... looked like a great rate, but the reality of the place was a disappointment to her. Now.. some would show up and probably be perfectly happy with this particular home (not in Windsor Hills by the way in case you're wondering)... everyone is different though.
I would suggest you make sure you see LOTs of pictures of the place, and that they're relative current ones too. If, for instance, you see an ad or website and it's all pictures of the resort clubhouse, the resort pool, and little-none of the house you will be in...or the interior, I'd be wary. Hopefully they already have this on their website, and they have a website, not just a vrbo ad with only 3 pictures on it.
In the boating world a common tactic is to take a picture of what they call the "sistership" of the same boat..but it's usually the picture from the factory brochure or something...it's a warning sign you might see the real thing in person and it might not look anything like the brochure photo! hehe