I used to sell a lot of Mac gear. IMHO, your price is a minimum of $500.00 too much for a C-22 in good condition being sold by a new seller. Just drop the price and you will get offers. That’s right, you will probably have to go a bit further if you want to sell it.
I would also strike the ebay reference in your ad. It really doesn’t educate your potential buyers as this is an audio specific site. Would you rather buy a used Ferrari from a Ferrari dealer or from Craigslist? The reference just drags your ad down. And it’s great that you love your wife, and I love mine as well, but respectfully, IMHO your potential buyers are not concerned with this part of the story. Nor probably the amps travels, though it is great that you put how long you owned it. And, for what it’s worth, Mac referred to the preamp as the C22, though I have seen other references to C-22, the type of collector ready to shell out four large on a classic preamp can be sensitive to things of this nature. I know, it seems like splitting hairs, but the best ad puts the best gear in the best light.
But in keeping with this being a specialist site you can add value by listing the brands of tubes, Teles or Mullard all through would certainly help the case, or if any work, or mods, have been done on the pre. Or, for that matter, if no work has been done on the pre. Some here are looking for completely original condition gear and some are looking for daily drivers that have had the coupling and power supply caps changed, new diodes, etc. You are not giving your prospective buyers any help here. You are also missing the boat by not showing interior shots to support any upgrades, or the lack of such. It’s kind of like you are trying to sell a car, not showing the engine, but saying that one sold for X dollars at the gypsy car lot on the corner.