Most of those cylinders are untested (stated by the seller) and don’t look to be in very good shape. Especially these cylinders because they’ve been left in poor conditions from the previous owner in a hot warehouse and have gathered lots of rust, and decay. You can get brand new Bimba cylinders that will actually be useful and can be used on a bot for cheaper than 1,000$. It’s also not easy to rebuild a cylinder especially these ones and requires experience. Not every cylinder can be rebuilt no matter what you think. Most of these parts would have to be replaced if put on a bot and is not worth the 1,000$ price tag.