If you’re selling video game controllers, the condition of them is EXTREMELY important- this is what I do to make sure the controllers are in VERY GOOD or LIKE NEW conditions- this will command up to a 100% premium.
Step 1. wipe off the big stuff
Step 2. clean the cracks with an x-acto knife
Step 3. clean the front buttons and divots
Step 4. clean the 9 pin serial port
Step 5. Bag it!
BUY THE STUFF I USED
Cleaner — http://amzn.to/2yDQgBG
KNIVES — http://amzn.to/2huw8ev
Playstation Controller — http://amzn.to/2AHlQzP
5 Easy Steps for Cleaning ANY Old Video Game Controller