Over the past 45 years I have operated 10 single screens, several twins and 3 drive-ins.
One of the twins was inside a shopping mall in which I assumed the lease after a large national chain had given it up. The chain owned the equipment and I had to purchase it from them. This was in the mid 90s. I bought everything for the two screens... booth equipment, concession, box office, auditorium seating, screens, speakers etc. for 10k. It was all in very good condition.
Every one of the single screens were privately owned, and in every case the equipment was owned by the theatre... therefore, the lease included the equipment as well.
When the leasee owns the equipment, it is generally a stipulation in the lease that the equipment must be either removed from the premises by the conclusion of the lease or forfeited to the buildings ownership. The fact that the equipment is still there in a theatre that has been closed for about 6 months raises the question as to who actually owns it. If owned by the previous operator, why is it still there? If owned by the person or company that owns the theatre, then why is it not included in the lease?
55k seems a bit high for used equipment to me.
Please feel free to leave a private message here at big-screenbiz or e-mail me and I'll be willing to discuss the operation of sigle screen theatres with you.