The excuses you make for holding on to an item are what is holding you back and creating your mess/clutter/hoard.
STOP making excuses. If you don't want a yard sale? Then get it all together and have Goodwill come get it and donate it all or call 800-Got Junk and have them remove it all.
You are NOT helping yourself with your excuses. You want SOME money out of it? Have a garage/yard sale. STOP making excuses and using reasons. If you donate it? You get the tax write off - if you sell it - then you get the money immediately. It doesn't matter if didn't get a huge portion of it back from taxes - the fact is you CLEANED OUT YOUR HOME.
Keep in mind - these items MAY be "priceless" to you - but you need to understand there's only so much someone will pay for something. The value is to YOU - not to others. It's like when we cleaned out my mom and dad's house after my mom died. the memories were OURS - but the items weren't going to fetch much at a yardsale - except for the vintage tupperware (which we ended up keeping for ourselves) and sold what we didn't want. My dad had a HARD time letting my mom's decorations go. He wasn't going to use them and they were taking up space and VERY DUSTY. In the end, we sat our dad down and said - here - watch TV and cleaned out the stuff.
You want a professional organizer? Then CALL AROUND and find out how much one is. Go to Groupon and Living social to see if there are any deals. Your "thinking" you can't afford one is another excuse for you to keep stuff. To hold on to it. If you believe and feels it's valuable then you need to take care of it.
Nothing will change until YOU CHANGE. You HAVE to want to let things go. YOU HAVE to understand that you might not get what YOU put into it. However - you HAVE to parce it out. Start in ONE room. A small room. Take EVERYTHING out of that room. EVERYTHING. Clean the room. If it's carpeted - clean the carpet. Then, when dry, start putting stuff back in the room. ONLY what the room NEEDS nothing more. Use the KISS method (Keep It Simple Silly). Mindset - the room has EVERYTHING IT NEEDS - key word NEEDS.
What doesn't go back? Goes OUT the door. Done. Don't look back. Don't use the "I might need this later" mentality. This is what is causing the hoarding.
YOU CAN DO THIS. Show your kids that hoarding is NOT normal and NOT a good way to live. How many items have you NOT touched in your house? How many items in your basement have you NOT missed??? If you have NOT touched in six months to a year? You DO NOT NEED IT....keep in mind NEED means that you will DIE without it. You will NOT DIE if you give away or sell these items. As it stands now? THEY are killing you.
Change your mindset. No, it's NOT easy.
Start small and just keep going - CLEANING OUT.
DO NOT ask $100 for something you know is only going to get $10. It WILL NOT sell. Dah. IF you REALLY feel it's worth something? then you need to research on ebay and google it - to see what you have. If you can show "value" then give the research too.
YOU HAVE TO WANT TO GET RID OF THE STUFF. If you don't? You're not ready and not helping yourself nor your family. Imagine if you died tomorrow - what mess would your family be left with? IS THAT WHAT YOU WANT??? If the answer is NO? You need to change your attitude and stop making excuses.
Consider a therapist as well. They can help you break through things that are holding you back and holding on to things. Take a picture. Keep the memory in a picture. Stop holding on to things that are only dragging you and your family down.