Selling vintage components


I plan on listing my McIntosh MA-230 amp for sale in the near future. I have a concern and would love to hear a few opinions on this. The amp was originally released from 1963 - 1966. I purchased the amp several years ago and Terry DeWick worked his magic on it. It's working fine, my issue is selling a 50-year-old amp only to have it die in the hands of a new owner. My gut would say refund the money to the buyer, so I would be out the selling price. I suppose anyone who purchases vintage electronics does so understanding the risks. Your thoughts would be much appreciated. 
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People sell vintage gear here all the time, you have nothing to worry about. And your concerns about the amp "dying" are really I think overstated. The fact that it's had a recent refresh means it has a long life ahead of it. Also anyone buying an amp of this vintage should understand what they are buying and any inherent "risks". There is a large community of McIntosh enthusiasts out there and tons of accumulated knowledge. Go ahead and sell your amp with a clear conscience..
This place buys used McIntosh. Give them a call!
http://www.audioclassics.com/
Sell to an individual - you get more and he pays less

Just describe it in detail, including the service history


I have read enough ads fot vintage equipment to list the following statements sellers use.

You can always rely on the phrase sold "as is , as pictured" with no warranty expressed etc. with no returns accepted . It is a vintage piece, as such, there may be issues which are not readily obvious. Then say something like- that it may not perform well in your system, which may  damage the amp/  Etc. 

Then tell the buyer as is happens to performing well and intended. Also tell of the recent overhaul anywhere you want to.

I appreciate the responses. I'll take all suggestions into account. The unit may be listed sooner rather than later.