I am confused a bit. If your wife demands some guitars be sold, the remedy for that is (IMHO) divorce. But if you are downsizing your place, and have some high dollar guitars you need to loose due to lack of new space, that is a totally different matter. Where to sell them and how to value them? I have had good luck selling guitars and gear right here on this forum in “for sale”. May not always work, but it is a no commission Pricing? For real high dollar guitar, I’d contact vintage dealers and find out what they’d ask. Then, in listing here, I’d cut that price by 10% to 15% for a start. For not so valuable gear, I’d check prices for the same stuff on Reverb. Then, I’d list it for 10% less here. And be prepared to negotiate, remembering that somebody isn’t taking a 20% to 30% commission off of what you receive. And by]y selling here om]n “member;s classified “ I always felt like my gear got a good home. I always told the seller what I liked (and didn’t) about the item. After the sale I always contacted them to see how it was going for them. Response has always g]been positive. One buyer fixed a problem I’d had with the item, and nobody wanted me to take the item back. It;s a good thing to sell on MLP.