When you have a rare amplifier, you also need the best Amp Tech in the business. 
All the Vintage Amplifiers I have for sale have been checked and serviced by Lars Vad, who is in my experience the best Amp Tech in Denmark. Therefore, I offer a 3 month warranty on all amps (and replaced tubes) I sell. However, because these are Vintage Amps they need to be handle with care and I recommend having them looked at by a skilled Amp Tech regularly. All my amps are ready to be played and sound fantastic. All sales are final for my Vintage Amplifiers and not returnable under any circumstances.