FQSVF water filters are hard to find cheap. These filters are made by GE. I have yet to find these filters cheaper than $30 anywhere, online or in stores. I do not think Lowe's stock these kinds of filters, but I have seen these filters for about $45 in home-depot stores.
Previously, I was able to purchase FQSVF filters for about $31.99 on filtersfast.com website but they charge about $5 to $7 shipping. That still makes it close to $40.