Digital imaging currently is not affordable for the average private practitioner. Conservatively, digital imaging would be in the area of S150,000 to $200,000. I believe digital imaging will be affordable for the private practitioner in the next five to seven years. If your reader intends to eventually go digital, he should purchase a high frequency generator which will be compatible with digital. Today, it is rare that high frequency systems are seen in the used market. New equipment affords the buyer peace of mind for five years. Hope this is helpful for your reader. If we can be of any further help, please let us know. Joyce Peterson