The knife pistol is an "UNWIN & RODGERS - Sheffield, England" piece. They made them both in percussion and cartridge form.
The flintlock pistol was PROBABLY made by Thomas Reynolds who had the address in "London & Birmingham" from 1812-1825 and then "London" from !825-1932 according to the listing in Gardner's book
Others may help with an approximate value, but it is VERY subject to condition