You are a new seller and do not get the best placement in Search.
Your shipping is higher than your asking price. This may be perfectly legitimate, but buyers hate that. You could switch them around, asking $25 for the lot and $10 for shipping. Better yet, ask $35 for the lot and offer “free” shipping.
“Used condition” is not very informative. Add a few lines describing paint chips, toothmarks, missing wheels, etc. Add pictures of the problem pieces.
Your pictures are okay, but if the pieces have names, add them to your description.
Only about 40% of items offered sell.