Be aware that the ATF has been stepping up efforts to prosecute gun-show dealers who don't have a Federal license (FFL). I doubt if renting a table and pricing them to sell would even blip their radar but multiple times, I don't know. I wouldn't make a side business out of it without the FFL. It is an option, but be prepared to spend a weekend and come back with at least one that no one wants.
Or find a dealer nearby who might do a lot buy or even sell consignment. I wouldn't expect more than $100 apiece for them that way though at most. You add a lot of middle.
Maybe offer her $500 for the whole lot and call it fair? I'd say it is, she gets peace of mind that someone legit has them now, you can even give her a bill of sale for her records, plus the deal is over and done with quickly. On your end, that isn't a bad lot for that price, looks like several nice teenager birthday presents in the mix, plus maybe a couple you want to keep, and maybe a couple you can sell to recoup for your money and effort.
edit: I just reread and realized this was only a sample. My rec stands, offer a set $50/each for the whole lot and it sounds fair, if this is really a good example of the collection.