There are a lot of variables involved.
- What kind of source and what condition it is in.
- Whether you want digital files or CDs.
- One file per side or the tracks separated into individual files.
- A raw CD with hand written information on it in envelope or one with a printed label, informational insert and/or jewel case.
Those are just main possibilities. Every job is unique and some prove to be "uniquer" than others..
With that in mind I charge $30 per hour for setting up the conversion, checking the playback levels for inconsistencies and doing whatever post-conversion work we have agreed on. Since I can do other things while the actual conversion is happening there is to time charge involved for that.
In general the conversion of a single cassette or record will cost between $15 and $25 for the first set of digital files, or first CD, depending on what you request, what I agree to and any unexpected challenges that come up in the process.
Converting from multiple sources on any one job will, of course, reduce the setup and post-conversion time investment and, therefore reduce the cost somewhat for that first set of files or the first CDs.
Once you have a set of digital files you can, of course, create as many copies of them as you want for yourself and if you can burn your own CDs you can make as many copies of them as you want. If, however, you want me to convert to CD(s) each copy after the first one will be substantially cheaper since the conversion.work will already be done and charged for with the first CD.