Amazon has this 27-Piece Cake Decorating Kit for only $10.99 (Reg $24.99) with Prime shipping. It features 24 stainless steel tips and 1 reusable silicone pastry bag and 2 reusable plastic couplers.
If you are not already a Prime Member you can join with a 30-day free trial of Prime, as a student with Prime Student, or as part of Amazon Family.
Please note that Amazon prices are subject to change at any time and may have increased or decreased since this offer was posted.