Fifteen kuai (US $2.50) gets you installed one lightly used replacement heel. Would you only replace one heel, though? Consider that option against buying a new set of shoes, and the calculations customers make as they compare potential embarrassment at not investing in a new pair of shoes against potential savings of replacing one heel. There’s also the comfort factor of non-matching heels, leading to an awkward gait (leading to a discovery of a non-original heel, and the previous calculation).
Is it pairs that good things come in?