Although many home supply stores, such as Home Depot and Lowes, sell only new lathes, the Industrial Machinery Company does have pre-owned conventional JET lathes for sale. This company has an online store that lists the current inventory of these used lathes.
There are different brands of pre-owned lathes listed that include Craftsman and Cutmaster. The JET lathe listed is 8 inches by 18 inches and has the model number 818P. The company states that it is in good condition and people can request a quote. The specification for this tool and what it come with is available online at the site.
JET lathes are used in woodworking. If finding a pre-owned JET lathe for a specific model is not possible, then the JET Tools website has many different types of new models available.