I can't sell digitals directly, but with any print purchase I will include the full-res file (basically the 4x6 is the price of the file). All files come with a personal/portfolio/agency usage license so you can make unlimited prints and post to your online portfolio. I can sell a whole set for $300 to one licensee.
All images © Ryan L. Sumner | Fenix Fotography. Violators will be prosecuted.