You talking about putting a car that you don't own? Unethical yes illegal no.
How would it not be fraudulent? What if I hit his reserve price at a ridiculously high number and he didn't have the item to sell?
1968 400 Coupe, verdoro green, black vinyl top 1968 400 Convertible, verdoro green, black top 1971 Trans Am, cameo white, auto 1970 Buick Skylark Custom Convertible 350-4(driver)