The agreement between the buyer and seller is referred to in legal terms as a conditionalsales contract. Quite often a down payment is required.
卖方与买方之间的这一协议，从法律的角度就是一种有条件合同，往往需先支付一笔定金。
2
The buyers legal status in conditionalsales, especially the buyers contingent right (das Anwartschaftsrecht) is a very controversial legal issue.
所有权保留买卖中买受人的法律地位，特别是买受人的期待权，是学说史一个颇具争议的难题。
3
Since the conditionalsales contract is a security agreement relating to specific equipment, the conditionalsales contract is now the type of collateral called chattel paper.