Yeah, I haven't seen one come up for sale in the last 6 years or so... Mr. Brown is correct, that tip kills some of the value. Is your intention for this to be a Safe Queen or a user? If its a Safe Queen, I'd knock a good $150-200 off the price they ask. You should send it to the shop to fix the tip. If the shop does the fix, you're a lot more likely to keep your collector value than if you do it!
As always YMMV, and good luck!!!!