Hi, I have a Boxford Model A and I love it. It is a perfect size for me and my workshop. I was very very lucky and picked mine up cheap (£100) with three, 3 jaw chucks and a 4 jaw and a few other extras. From what I`ve seen on homeworkshop website, £500 would be top end wouldn`t it guys? - but that isn`t to say it isn`t worth it depending on condition and what is with it.
Good luck
Chris