WordNet sense 1 (cheap and shoddy):

tawdry, cheapjack

WordNet sense 2 (of low or inferior quality):

inferior

WordNet sense 3 (of inferior workmanship and materials):

jerry-built

WordNet sense 4 (having little physical or spiritual strength):

weak

WordNet sense 5 (designed to deceive or mislead either deliberately or inadvertently):

deceptive, misleading

WordNet sense 6 (deceptive or fraudulent; disposed to cheat or defraud or deceive):

dishonest, dishonorable