I priced Kissimmee Guest Services (KGS) and
Undercover Tourist (UT) for 5-day MYW base ticket. KGS tickets seem lower-priced because
they don't include tax in their posted prices, nor do they post shipping cost, which I could not see unless I gave them all my personal info + email + cell #. UT posted prices include tax and free shipping.
KGS 5-Day MYW $237 + (hidden 6.5% tax $15.41 + hidden shipping cost which I couldn't access) =
$252.41 PLUS shipping $_
???_
UT 5-day MYW =
$246.95 Total including tax and free ship
The KGS price of $252.41 is the same as Disney's walk-up or reservations price. Yet, I presume you want the tickets shipped, and they don't advertise free shipping, so presume a shipping charge on top of that. They are located in Celebration, FL, and perhaps the RE agents you heard from were relating to tourists renting condos in the Celebration area who will just stop by their office in person.
If time 'til trip is short, just buy at Disney. Otherwise, I would go with UT for the best, upfront price including tax and free shipping. To save an additional $5/ticket, subscribe to Mousesavers Newsletter
http://www.mousesavers.com/newsletter.html. This comes to your email around the 15th of the month and there is always a link there to UT for this additional ticket savings. I have used this myself and I am extremely impressed with UT pricing and policies.