Vandersteen/Mccormack/audio design questions

You could use Audiogon's auction feature and the highest bidder will dictate he true market value which isn't a whole lot these days.

It would be fair to any buyer that you explain that you're not exactly sure of the working condition or maintenance conducted on these units ( tube age, cap replacement, etc) since you haven't lived with them as an owner.

I would use audiogon’s own resale audio data (Bluebook) and compare that to the estimates you get from the Chicago area shops. Just remember, that if you plan to sell or auction the equipment and offer the buyer shipping....you should have the boxes for proper packaging or use a professional packager for shipping. Those 3A speakers really need the original carton from Vandersteen. Most people charge a fair price for this, but it benefits both seller and buyer for the equipment to arrive to it’s destination without damage. You could always offer local sale and pickup only. The items you have are high-fidelity audio pieces and should both fetch a good price AND be handled with appropriate care. Good luck!