If your car is a 69, then it wouldn't have been originally sold with a 711M, so it may have been rebuilt, or it may have come from a GT Capri/Cortina etc. The Deluxe also had the 711M, just not having the sporty cam, etc.
They tend to be one of the more favoured blocks for modifying. The main advantages they have are thicker walls and stronger square main caps as standard. You might get $2-300 for the whole engine, but I haven't been paying attention to prices.
If the engine has been swapped, then the gearbox may have been also. If it has a GT/XL gbox then it should be a close ratio, and the deluxe box will be the standard ratio gbox with a noticeable (and frustrating) gap between 2nd and 3rd gear. A close ratio box needing a rebuild may also be around $2-300.
The diff ratio in a deluxe (from memory) is 4.11, and is 3.89 in a GT/XL. The diffs are otherwise the same.
Your best money will come from selling the front struts to someone wanting stronger struts for their Mk1 Escort. Same as Escort Twin-Cam struts apparently. A few years back people were getting $5-600 for those.
Cheers
Jamie