"Something else to think about is the passage of time. That wonderful gear you have now may not be worth much in 20 or 30 years. As Im moving into a smaller place Ive been trying to sell an Infinity FET preamp and Marantz 250 power amp - very highly desirable items in the 80s. I havent had any interest yet, I guess their desirability has aged out. I contacted TMR and and received a reply due to market conditions we are not able to make an offer at this time. Enjoy your gear, but keep in mind that it might not be a long-term investment."
I just wanted to say from my personal experience - if I took an amp like that in a condition like your amp to my local repair shop, I would get $300 if I was lucky, but likely less. Here’s their math.. They check ebay prices, which on this model are around $1k. A full service at their shop on such Marantz, including full recap, would run around $1k. Plus their sales commission of 30 percent. Plus your $300. So once they service it, considering all of the above, they would list it for about $1500 as fully restored with 1 year warranty, and will also lower that price further if it does not sell quickly - 2-3 weeks. I hope this helps as it’s not very clear how you’ve arrived at your asking price, but seeing that your amp needs full service, and hardly anybody can do full service now days, it’s a hard sell.. I personally would not pay more than $400-500 for any vintage unrestored amp - now that I know how much it costs to restore - and also how long it takes.. Anyway, hope this helps.. I have a vintage Pioneer amp that I will never ever sell for that reason alone, as it cost me in repairs more than a modern day Mcintosh amp costs..