It is better not to buy in installments if you are able to pay in cash

No File Exists
Check below answers in case you are looking for other related questions:
It is permissible to raise the price of a product in return for paying in installments
Ruling on children’s transactions

No File Exists
Related Answers:
What conditions should be met in order for the bank’s purchase scheme (muraabahah) to be considered permissible
If his relatives want particular types of perfume, is it permissible for him to buy them and sell them to them?
His friends ask him to buy computers for them and he adds a profit for himself
It is permissible to raise the price of a product in return for paying in installments
Ruling on children’s transactions

Recommended answers for you:
What is the janaabah that makes ghusl obligatory?
Is zinaa intercourse only?
A woman refusing to have intercourse with her husband
Ruling on selling cats
Divorce (talaaq) in the state of anger; and is it necessary to have witnesses to divorce?