I don't.
You don't get that many bells so I don't see the point in selling things to her.
The only thing I might sell are the Cowrie Shells so I can tell what's a Hermit Crab easily.
But that's typically all I would sell to her.
There's no real point in selling to her because you don't make that many bells.
As stated in a prior post, Leila gives you 5% of Reese's buy price.
I see her basically as a recycle bin (sorry!), at least you don't have to pay to get rid of stuff via her.
I like the beach clear of shells so I sell her those and any of the least value bugs/fish I catch.
I keep my island full of flowers as I want to catch birdwings for other towns's bug offs.
At night I catch and keep temporarily Emperors - if I have enough time I keep catching to replace them, otherwise at least I go home with a full basket.
An Emperor sells for 125 bells with Leila - it soon mounts up.
I sell less valuable things to her, unless I'm just on the island working towards the bug catching/ fishing/ diving badges, in which case I sell everything to her.
I just stock up on beetles which I dump into that basket and when it is full I stock up on more which I sell to Leila once I leave (I don't even bother talking to her, though, lmao).
i dont even know who the heck is leila until i read some of the post and i remember shes the little kappa with no friends lol. and no, i never sell to her, not even the bugs and fishes with no value. id rather sell them to reese. why get 3 bells for them when you can get 100?
I never sell anything to her, she's a huge rip off LOL. Even when I have bugs that aren't as valuable chances are i'd get more from retail then I can from her but I usually don't catch bugs that aren't worth all that much anyway so it's not really worth catching them. Usually if I still have things in my pockets that I don't need i'll just sit down on the chair when I want to go home and Grams tells me if I sit down my items will get sold but since i'm too lazy to sell them myself, I just let her sell them. Instead of going to Leila.