I warned you that this is an addictive hobby
Well it all comes down to how much you want the machine. I will say honestly the machine is not worth that much. But it is a really cool machine. I have had two and really kick myself for selling them. Now as for a machine to use your Cav 51 only vends small bottles which can be hard to find but the VMC-88 vends any bottles under 12 ounces which really makes it more practical. Especially if you are a beer drinker. As long as you are not buying for resale I would say that value is based on how much you like the machine. Also since you are in England it is not likely another will be showing up on ebay withing driving distance in the next week or so. I am an American but I am living in Singapore for a few years and had to give up my hobby. I would say that if I were to find a VMC-88 here for that price I would buy it without thinking twice. You need to talk to Dave. He live in England and has a very impressive collection. He will be able to gauge the value better than any of us. He may even have a better deal for sale?