Get a lawyer to help with the sales agreement. Assume that they're not trustworthy (they rarely are). But they'll do the same with you. Ensure that assets belo

Get a lawyer to help with the sales agreement. Assume that they're not trustworthy (they rarely are). But they'll do the same with you. Ensure that assets belong to you before the full payment, but also ensure that they get everything after full payment. Both of you should sit with the lawyer and discuss it.