I'd put the value of the FN 1910 in the balkpark of $200 to $350 if it has all parts and is fully functional. The P38 appears to be a Walther model with a 43 date. That gun could be in the $700 to $1200 range depending on condition, and markings. There are many small variations in these pistols that can affect price.
As to selling the guns, much depends on what state you are in. In the states like California and similar, you have to make all sales through a dealer, and pay a fee for the privilege. In free states you can sell privately within the state, but not across borders. You need to check the rules where you live. These guns would probably fall under C&R rules, which makes them easier to sell in some states, but not others. In my state the purchaser would still need to obtain a handgun purchase permit, be the holder of a concealed carry license, or have an 03 FFL (C&R) license. You would collect the permit or a copy of the license at the sale. In all cases you would be responsible to assure that the person you sell to is "legal" to own this type of firearm, which would include age verification. You wouldn't want to be responsible for selling the guns to a convicted felon that then used them to commit a crime. Bottom line is, depends on where you live.
