How can you reduce the smell of well water other than paying for a high price filtration system?

The best low cost system is a sediment filter followed by a carbon filter. In 10" x 2" size, these can be fitted under your kitchen sink. These units cost about 30-50 each and have replaceable elements about $3-4 for sediment and $5-15 for carbon. An average handyman can fit in about 2 hours. Available in almost all hardware stores and HD.

A low cost carbon filter can reduce the mineral taste of water. You have probably seen them, they install on your faucet. If these filters are what you would refer to as high price (20-50 bucks), then kool-aid is what you need.