Don't know too much about the rest,, but the Rogers LS3/5A bring big money among the Japanese.
Can't clearly see the back panel of the Rogers, but if they are 15 ohm versions, they should be worth something like $1750, possibly more depending on how good the cabinets are and if they are in excellent operating condition. 8 ohm versions and the Splendor not so much, but still in the $1K range, again depending.
Condolences and good luck!
If you do an advanced search on Ebay sold listings,you will see that the Rogers can fetch as much as $5000 and the Spendor over $1000. If the Rogers are the gold badge 15 or 11 ohm version then you have gold . Of course condition is a big factor ! Both of those are very collectable. It looks like both pairs have been converted to bi-wire ( not original ) and might effect the value !
Good luck !
Some of the 11 or 15 ohm Rogers LS3/5a speakers are originally bi-wired. (I have just such a pair.) I suspect that yours are either 11 or 15 ohm versions; from the look of the label, I would bet 11 ohm. As others have noted, these are classics, valuable in decent condition (having appreciated significantly over the years), and worth keeping.