I don't do a lot of painting but most people by paint brushes for touch ups in there house or when they are staining back a cabinet or table etc

People often get the cheapie brush as they say its a one off job but they tend to drop a lot of bristles and you will spend half your time picking of hairs of your job

These were good washed in turpentine and then warm soapy water as paint brushes on packaging said

Approximate cost: $25