SELLING IT ALL

Holmz13 -- I'm sorry you are distrustful. I'm just a woman who can FINALLY get rid of her husband's obsession. Check with your stereo buddies and I'm sure you'll find many of us. :-)

Thanks for your suggestions, all. There isn't a good stereo store here in my area. (Maybe Tyler? I'll try there. Certainly not Longview, where I am.) I don't want to let it go for a song -- it nearly bankrupted us getting it in the first place. But I know I won't get a fraction of the value back.
To LALITK -- Yes. Lots of music. He loved smooth jazz. Hundreds of CDs. Also collected old disco and a few other things. What are you looking for?

Thank you all for your good advice. You are wonderful!
Special thanks to BartS -- you actually helped me take a deep breath and decide my next steps.
Here's what I'm going to do:1.  Using Bart's suggestion, I will go through each system (he has 6, plus miscellaneous stuff) and get it all spreadsheeted, doing one system a day over the course of a week or so.2.  Locate the boxes (yes, hoarded those, too) and paperwork/manuals and match them up.3.  Get everything dusted and take photos.4.  Let you all know when I've done that and where you can locate the sheet and photos to look at. (Will park on my website on a hidden page.)5.  Then see where things go.
While I'd like it all gone tomorrow, I really do want to get back some of the value, as I've worked years paying it all off as he went along. (Note to those of you with a non-stereo spouse/significant other!) I figured if I floated the problem of getting rid of it all to you guys, you'd have good ideas. Thanks so much, and I'll be back with more details soon.
Becca

To Wichita Dog -- I am currently inventorying all the interconnects. Will let you know what I have when I'm done. Thanks!

Very good advice from you all. No, my husband was never honest about what things actually cost. HOWEVER, I have a lot of sales receipts. And for the others, I am looking up the MSRP and putting it on the spreadsheet. I'm well over $70,000 in that column so far. Obviously, some things have devalued, but others have appreciated. So, it's a rough guess. I made him give me numbers for a lot of it several years ago to make sure our insurance agent had a spread sheet of it in case of loss.
Very good point about not making a profit. So, if it sells for less than he bought it for, then I don't have to claim as income? Or just not as gains? Interesting question. I'll check with tax accountant.
Y'all are a fount of good information. I really, deeply appreciate it.