You're right that this is currently listed for sale, for $421,900, but the listing company is Downing-Frye, not Delta Realty. You may have been looking at the MLS on Delta Realty's website, which may be part of the confusion. We all participate in a shared MLS search program, but it does identify the listing broker (it usually says, "listing courtesy of ...").
As for why it is not shown for sale on Trulia, that is an easy answer. Trulia listings are not automatic from the MLS. Agents must either manually upload their listings to Trulia, or we must use some type of software to have our listings bulk uploaded to the website. The listing agent must not subscribe to Trulia feeds.
If you are interested in the condo, let me know. Pelican Bay has a great many really good buys right now.
Exceptional Properties of SW Florida
(239) 289-1403 Cell