Yes there are budget silver cables.
The issue can be that cheap silver cables can be unflatteringly revealing on your components. The better the silver cables the less harsh they are.
So my first question is what is your system. There is a place under your UserID (click around) to put photos and identify your system. This would be extremely helpful to us… allowing us to help you.
In general: copper is warm and covers up harshness in inexpensive components. Silver coated copper can help reveal detail without giving up bass. Finally silver can be fast and detailed… but harsh and light on the bass. This is for budget cables.
Even for fairly good systems silver can be really bad. Now, high end, the materials become less important as techniques of using dielectric coatings, geometry, and strand size and mixtures of filaments effect the sound.
Having said all this. If you want to try, my go-to budget brand is DHLabs Silver Sonic.
So if your system is warm… and you are craving greater detail._ inexpensive silver may do the trick.