Hi & welcome to the wonders (and frustrations) of R2R! I am new here, but have been into R2R for 50 years. Surprised no one seems to have answered your question. I have the same model, and your heads look much like mine -- that is, what appears to be some normal wear but not bad. Best if you haven't already is to get your photo examined by a head relapping expert like JRF Magnetics...
http://www.jrfmagnetics.com ... AFAIK, they are the "masters" of tape heads. I didn't send a photo but had them quote me for relapping or replacing heads in my Otari, and the reply was prompt and complete -- this was from John French,
[email protected]:
1. Relap each Otari MX5050 (BII) 1/4-inch head @ .........$ 65.00 each
2. New replacement 2-track record or playback head........$165.00
3. New 1/4-tk playback head (Nortronics)..................$145.00
4. Mount heads and Optically Align assembly...............$ 65.00
The heads that we relap will look and perform as new and the assembly will return aligned and ready to re-install.
Hope this helps! ...Alex