Trex18

Hi All ! First Post here. We recently purchased our forever home and it came with a indoor hot tub/spa. It looks like a very very nice model. It has tile all around the top, the wood is in great shape around everything and it has always been kept inside. They actaully moved it in, the built the house around it. Its seems like a very very large hot tub as well. BUT..... I mean BUT....... Its old. Is it any good? It looks to be great quality tub. heavy thick and tiled but the internals I dont know. We have a large drain in the room its in also. Is it cheaper to get a new tub, or to have someone come and repair everything? Any advice would be great. Here is the model numbers. DownEast 04-900T BrettAqualine pump that looks to be 20 years old.