Amazon Prime members can get this Pentel Arts Oil Pastels, 25 Color Set for just $1.99 (Reg $29.99) when purchasing it as an Add-On Item. You can also choose the 50 color set for $3.98 as an Add-On.
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.