What are these speakers that came with my home worth?

I did a little checking these are at least 15 years old ,and no longer 
made, these have powered amplifiers . You will just have to see what the market will bear . The buyer most likely will have knowledge of this type of speaker already , and likes its unique trades . These are selling if you go on ebay ,
or Audio shark for a fraction of their new price. The velodyne subs 
depending how old they are ,the newer ones have a microphone and Bass room correction  .this is why I said ,go to Audiogon 
Blue book and look up the model to get a ball park figure, and condition ,have you hooked them up to make sure they work perfectly . If need be have them put on consignment. Since they came with the house get what you can and market is very small 
on these ,this is going from just what I looked. Up. Best of luck.

hifishark is also a good resource to see what like items are selling for (or have sold for - click the sold/expired tab).

Thank you so much everyone for taking the time to respond. 
Just to answer the earlier question, the Velodyne subs are DD. 
I will look around and list. With hope someone local in the Bay area really wants them 

although dated those dd subs still keep up with some of the best subs made.  They lose a little demand for being 18" which is pretty large for most peoples homes.  The meridian are amazing speakers but also a bit dated and not often looked for.  That being said original price was closer to $25,000.  Current market is about $800-$1200 for each sub.  $1500 for the DSP5000 pair and $2500 for the DSP6000 pair if priced for pretty quick sale.  Id say $6000 mentioned above is a good ballpark

   The owners of a $9000. REL Studio III and a JL Audio F113 wanted to compare their subs to my subwoofer at the time a Velodyne Digital Drive 18. The combined consensus of the comparison was the F113 coming a close second to the DD-18 but only when fed the manually equalized Velodyne signal. 
   The REL owner sold the Studio III a few days after the comparison. REL has gone through many changes none of which seem to have been directed to their fundamental sub design.

   Since then Velodyne introduced their Plus series followed a few years later by the JL Audio DARO version still lacking extensive manual EQ and a $1900. optional CR-1crossover.
   Reading the SVS Ultimate setup procedure they include three memory EQ presets and a Q adjustment a notable DSP direction. 
   Aged and recently out of production the onboard conveniently remote controlled Velodyne Plus AFAIK is only approached by one or two third party equalization programs. The digitally servo controlled Velodyne DD series still provides one of the lowest levels of distortion and is far from outdated. Third party service is available.