I do. They are recorded live on the job, and labeled as such, so they are covers.
I did one one time (it was a tape back then) with covers on one side and orginals on the other.
I charge $10.00 each, record and burn them myself, and make the labels myself. I do display them. Currently I am preparing the next one. Should be finished in a week or so.
They are not a significant income item, but they help. Sometimes I sell several a night, sometimes I go weeks without selling one. Depends on the venue.
DonM