Hot Wheels isn't normally a toy line I post much about, but then, they don't normally make something that stands out as an item I as a non-Hot Wheels collector might want to buy. This strikes me as a pretty big exception. And frankly, like Bart, I always thought Homer's car was cool.
Though Mattel doesn't say it in their product description, there's pretty clearly a sound component, which I presume and hope will honk "La Cucaracha." Though if you live in almost any area of Los Angeles, you hear vegetable trucks do that every day and it might not be so novel. (Yes, produce advertising with a song about cockroaches. And somehow it works nonetheless.)