See, my thinking is you look and look just to prepare yourself for the moment. When you see something that meets your requirements, you can’t ask for more pictures, do some web research, etc. You make an offer at what price makes sense to you. If it’s turned down, you move on, with no regrets. If it’s accepted, you still have an opportunity to see in person that the lathe is as advertised...be fair though, no going back on a deal because of cold feet, only if it has been misrepresented.
Otherwise, you will lose out over and over.