Yes, I find some items on eBay go for more than they’re worth because people get involved in a bidding war just because they want to “win”. Can work in your favour if you’re selling...Adverts in the classifieds on here.
I use eBay sold items and hifi shark sold items to gauge price.
Usual caveats apply, if you can audition, if you can pick it up and check working, cash on collection, don’t use PayPal family and friends, if using paypal remember you have no insurance if it is not delivered.
Some great bargains out there but be patient and wait for what you want at the price you want to pay, don’t get suckered into a bidding war. Personally on eBay I agree a price with myself and then bid that as a max bid with 3 seconds to go, if I miss out I wait for the next one.