Here are some examples:
* דאָס איז אַ ביליגער זאַך (Dos iz a billiger zach) - This is a cheap thing.
* די פרייז איז ביליג (Di preis iz billig) - The price is cheap.
However, "cheap" can also have a negative connotation in Yiddish, meaning something is of poor quality or not worth the money. In that case, you might use פֿאַרקוירצט (farkurtst) or נישט ווערט די געלט (nisht wert di gelt).
Here are some examples:
* די זאַך איז פֿאַרקוירצט (Di zach iz farkurtst) - The thing is cheap (meaning of low quality).
* די זאַך איז נישט ווערט די געלט (Di zach iz nisht wert di gelt) - The thing is not worth the money.
It's important to consider the context and the intended meaning when choosing the best Yiddish word for "cheap."